diff --git a/pyhamtools/callinfo.py b/pyhamtools/callinfo.py
index bde9959..aebb135 100644
--- a/pyhamtools/callinfo.py
+++ b/pyhamtools/callinfo.py
@@ -1,16 +1,12 @@
 import re
 import logging
-from datetime import datetime
+from datetime import datetime, timezone
 import sys
 
-import pytz
-
 from pyhamtools.consts import LookupConventions as const
 
 from pyhamtools.callsign_exceptions import callsign_exceptions
 
-UTC = pytz.UTC
-
 if sys.version_info < (2, 7, ):
     class NullHandler(logging.Handler):
         def emit(self, record):
@@ -81,10 +77,10 @@ class Callinfo(object):
         """truncate call until it corresponds to a Prefix in the database"""
         prefix = callsign
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         if re.search('(VK|AX|VI)9[A-Z]{3}', callsign): #special rule for VK9 calls
-            if timestamp > datetime(2006,1,1, tzinfo=UTC):
+            if timestamp > datetime(2006,1,1, tzinfo=timezone.utc):
                 prefix = callsign[0:3]+callsign[4:5]
 
         while len(prefix) > 0:
@@ -115,7 +111,7 @@ class Callinfo(object):
 
         Args:
             callsign (str): Amateur Radio callsign
-            timestamp (datetime, optional): datetime in UTC (tzinfo=pytz.UTC)
+            timestamp (datetime, optional): datetime in UTC (tzinfo=timezone.utc)
 
         Raises:
             KeyError: Callsign could not be identified
@@ -124,7 +120,7 @@ class Callinfo(object):
         """
         entire_callsign = callsign.upper()
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         if re.search('[/A-Z0-9\\-]{3,15}', entire_callsign):  # make sure the call has at least 3 characters
 
@@ -230,7 +226,7 @@ class Callinfo(object):
 
     def _lookup_callsign(self, callsign, timestamp=None):
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         # Check if operation is invalid
         invalid = False
@@ -278,7 +274,7 @@ class Callinfo(object):
 
         Args:
             callsign (str): Amateur Radio callsign
-            timestamp (datetime, optional): datetime in UTC (tzinfo=pytz.UTC)
+            timestamp (datetime, optional): datetime in UTC (tzinfo=timezone.utc)
 
         Returns:
             dict: Dictionary containing the callsign specific data
@@ -315,7 +311,7 @@ class Callinfo(object):
         callsign = callsign.upper()
 
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         callsign_data = self._lookup_callsign(callsign, timestamp)
 
@@ -332,7 +328,7 @@ class Callinfo(object):
 
         Args:
             callsign (str): Amateur Radio callsign
-            timestamp (datetime, optional): datetime in UTC (tzinfo=pytz.UTC)
+            timestamp (datetime, optional): datetime in UTC (tzinfo=timezone.utc)
 
         Returns:
             bool: True / False
@@ -348,7 +344,7 @@ class Callinfo(object):
 
         """
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         try:
             if self.get_all(callsign, timestamp):
@@ -361,7 +357,7 @@ class Callinfo(object):
 
         Args:
             callsign (str): Amateur Radio callsign
-            timestamp (datetime, optional): datetime in UTC (tzinfo=pytz.UTC)
+            timestamp (datetime, optional): datetime in UTC (tzinfo=timezone.utc)
 
         Returns:
             dict: Containing Latitude and Longitude
@@ -388,7 +384,7 @@ class Callinfo(object):
 
         """
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         callsign_data = self.get_all(callsign, timestamp=timestamp)
         return {
@@ -401,7 +397,7 @@ class Callinfo(object):
 
         Args:
             callsign (str): Amateur Radio callsign
-            timestamp (datetime, optional): datetime in UTC (tzinfo=pytz.UTC)
+            timestamp (datetime, optional): datetime in UTC (tzinfo=timezone.utc)
 
         Returns:
             int: containing the callsign's CQ Zone
@@ -411,7 +407,7 @@ class Callinfo(object):
 
         """
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         return self.get_all(callsign, timestamp)[const.CQZ]
 
@@ -420,7 +416,7 @@ class Callinfo(object):
 
         Args:
             callsign (str): Amateur Radio callsign
-            timestamp (datetime, optional): datetime in UTC (tzinfo=pytz.UTC)
+            timestamp (datetime, optional): datetime in UTC (tzinfo=timezone.utc)
 
         Returns:
             int: containing the callsign's CQ Zone
@@ -433,7 +429,7 @@ class Callinfo(object):
 
         """
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         return self.get_all(callsign, timestamp)[const.ITUZ]
 
@@ -442,7 +438,7 @@ class Callinfo(object):
 
         Args:
             callsign (str): Amateur Radio callsign
-            timestamp (datetime, optional): datetime in UTC (tzinfo=pytz.UTC)
+            timestamp (datetime, optional): datetime in UTC (tzinfo=timezone.utc)
 
         Returns:
             str: name of the Country
@@ -460,7 +456,7 @@ class Callinfo(object):
 
         """
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         return self.get_all(callsign, timestamp)[const.COUNTRY]
 
@@ -469,7 +465,7 @@ class Callinfo(object):
 
         Args:
             callsign (str): Amateur Radio callsign
-            timestamp (datetime, optional): datetime in UTC (tzinfo=pytz.UTC)
+            timestamp (datetime, optional): datetime in UTC (tzinfo=timezone.utc)
 
         Returns:
             int: containing the country ADIF id
@@ -479,7 +475,7 @@ class Callinfo(object):
 
         """
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         return self.get_all(callsign, timestamp)[const.ADIF]
 
@@ -488,7 +484,7 @@ class Callinfo(object):
 
         Args:
             callsign (str): Amateur Radio callsign
-            timestamp (datetime, optional): datetime in UTC (tzinfo=pytz.UTC)
+            timestamp (datetime, optional): datetime in UTC (tzinfo=timezone.utc)
 
         Returns:
             str: continent identified
@@ -508,6 +504,6 @@ class Callinfo(object):
             - AN: Antarctica
         """
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         return self.get_all(callsign, timestamp)[const.CONTINENT]
diff --git a/pyhamtools/dxcluster.py b/pyhamtools/dxcluster.py
index c148c76..f427a76 100644
--- a/pyhamtools/dxcluster.py
+++ b/pyhamtools/dxcluster.py
@@ -1,18 +1,11 @@
 __author__ = 'dh1tw'
 
-from datetime import datetime
+from datetime import datetime, timezone
 from time import strptime, mktime
 import re
 
-import pytz
-
 from pyhamtools.consts import LookupConventions as const
 
-
-UTC = pytz.UTC
-
-
-
 def decode_char_spot(raw_string):
     """Chop Line from DX-Cluster into pieces and return a dict with the spot data"""
 
@@ -31,7 +24,7 @@ def decode_char_spot(raw_string):
 
     data[const.DX] = re.sub(r'[^A-Za-z0-9\/]+', '', raw_string[26:38])
     data[const.COMMENT] = re.sub(r'[^\sA-Za-z0-9\.,;\#\+\-!\?\$\(\)@\/]+', ' ', raw_string[39:69]).strip()
-    data[const.TIME] = datetime.now().replace(tzinfo=UTC)
+    data[const.TIME] = datetime.now(timezone.utc)
 
     return data
 
diff --git a/pyhamtools/locator.py b/pyhamtools/locator.py
index 707534b..2f0872a 100644
--- a/pyhamtools/locator.py
+++ b/pyhamtools/locator.py
@@ -1,11 +1,8 @@
 from math import pi, sin, cos, atan2, sqrt, radians, log, tan, degrees
-from datetime import datetime
+from datetime import datetime, timezone
 
-import pytz
 import ephem
 
-UTC = pytz.UTC
-
 def latlong_to_locator (latitude, longitude):
     """converts WGS84 coordinates into the corresponding Maidenhead Locator
 
@@ -282,16 +279,14 @@ def calculate_sunrise_sunset(locator, calc_date=None):
            The following calculates the next sunrise & sunset for JN48QM on the 1./Jan/2014
 
            >>> from pyhamtools.locator import calculate_sunrise_sunset
-           >>> from datetime import datetime
-           >>> import pytz
-           >>> UTC = pytz.UTC
-           >>> myDate = datetime(year=2014, month=1, day=1, tzinfo=UTC)
+           >>> from datetime import datetime, timezone
+           >>> myDate = datetime(year=2014, month=1, day=1, tzinfo=timezone.utc)
            >>> calculate_sunrise_sunset("JN48QM", myDate)
            {
-               'morning_dawn': datetime.datetime(2014, 1, 1, 6, 36, 51, 710524, tzinfo=<UTC>),
-               'sunset': datetime.datetime(2014, 1, 1, 16, 15, 23, 31016, tzinfo=<UTC>),
-               'evening_dawn': datetime.datetime(2014, 1, 1, 15, 38, 8, 355315, tzinfo=<UTC>),
-               'sunrise': datetime.datetime(2014, 1, 1, 7, 14, 6, 162063, tzinfo=<UTC>)
+               'morning_dawn': datetime.datetime(2014, 1, 1, 6, 36, 51, 710524, tzinfo=datetime.timezone.utc),
+               'sunset': datetime.datetime(2014, 1, 1, 16, 15, 23, 31016, tzinfo=datetime.timezone.utc),
+               'evening_dawn': datetime.datetime(2014, 1, 1, 15, 38, 8, 355315, tzinfo=datetime.timezone.utc),
+               'sunrise': datetime.datetime(2014, 1, 1, 7, 14, 6, 162063, tzinfo=datetime.timezone.utc)
            }
 
     """
@@ -303,7 +298,7 @@ def calculate_sunrise_sunset(locator, calc_date=None):
     latitude, longitude = locator_to_latlong(locator)
 
     if calc_date is None:
-        calc_date = datetime.utcnow()
+        calc_date = datetime.now(timezone.utc)
     if type(calc_date) != datetime:
         raise ValueError
 
@@ -349,11 +344,11 @@ def calculate_sunrise_sunset(locator, calc_date=None):
     result['sunset'] = sunset
 
     if morning_dawn:
-        result['morning_dawn'] = morning_dawn.replace(tzinfo=UTC)
+        result['morning_dawn'] = morning_dawn.replace(tzinfo=timezone.utc)
     if sunrise:
-        result['sunrise'] = sunrise.replace(tzinfo=UTC)
+        result['sunrise'] = sunrise.replace(tzinfo=timezone.utc)
     if evening_dawn:
-        result['evening_dawn'] = evening_dawn.replace(tzinfo=UTC)
+        result['evening_dawn'] = evening_dawn.replace(tzinfo=timezone.utc)
     if sunset:
-        result['sunset'] = sunset.replace(tzinfo=UTC)
+        result['sunset'] = sunset.replace(tzinfo=timezone.utc)
     return result
diff --git a/pyhamtools/lookuplib.py b/pyhamtools/lookuplib.py
index 6193611..0e7b8bf 100644
--- a/pyhamtools/lookuplib.py
+++ b/pyhamtools/lookuplib.py
@@ -3,7 +3,7 @@ import logging
 import logging.config
 import re
 import random, string
-from datetime import datetime
+from datetime import datetime, timezone
 import xml.etree.ElementTree as ET
 import urllib
 import json
@@ -14,14 +14,11 @@ import unicodedata
 import requests
 from requests.exceptions import ConnectionError, HTTPError, Timeout
 from bs4 import BeautifulSoup
-import pytz
 
 from . import version
 from .consts import LookupConventions as const
 from .exceptions import APIKeyMissingError
 
-UTC = pytz.UTC
-
 REDIS_LUA_DEL_SCRIPT = "local keys = redis.call('keys', ARGV[1]) \n for i=1,#keys,20000 do \n redis.call('del', unpack(keys, i, math.min(i+19999, #keys))) \n end \n return keys"
 
 if sys.version_info < (2, 7,):
@@ -333,7 +330,7 @@ class LookupLib(object):
 
         Args:
             callsign (string): Amateur radio callsign
-            timestamp (datetime, optional): datetime in UTC (tzinfo=pytz.UTC)
+            timestamp (datetime, optional): datetime in UTC (tzinfo=timezone.utc)
 
         Returns:
             dict: Dictionary containing the country specific data of the callsign
@@ -346,10 +343,9 @@ class LookupLib(object):
            The following code queries the the online Clublog API for the callsign "VK9XO" on a specific date.
 
            >>> from pyhamtools import LookupLib
-           >>> from datetime import datetime
-           >>> import pytz
+           >>> from datetime import datetime, timezone
            >>> my_lookuplib = LookupLib(lookuptype="clublogapi", apikey="myapikey")
-           >>> timestamp = datetime(year=1962, month=7, day=7, tzinfo=pytz.UTC)
+           >>> timestamp = datetime(year=1962, month=7, day=7, tzinfo=timezone.utc)
            >>> print my_lookuplib.lookup_callsign("VK9XO", timestamp)
            {
             'country': u'CHRISTMAS ISLAND',
@@ -373,7 +369,7 @@ class LookupLib(object):
         """
         callsign = callsign.strip().upper()
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         if self._lookuptype == "clublogapi":
             callsign_data =  self._lookup_clublogAPI(callsign=callsign, timestamp=timestamp, apikey=self._apikey)
@@ -498,7 +494,7 @@ class LookupLib(object):
 
         Args:
             prefix (string): Prefix of a Amateur Radio callsign
-            timestamp (datetime, optional): datetime in UTC (tzinfo=pytz.UTC)
+            timestamp (datetime, optional): datetime in UTC (tzinfo=timezone.utc)
 
         Returns:
             dict: Dictionary containing the country specific data of the Prefix
@@ -535,7 +531,7 @@ class LookupLib(object):
 
         prefix = prefix.strip().upper()
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         if self._lookuptype == "clublogxml" or self._lookuptype == "countryfile":
 
@@ -555,7 +551,7 @@ class LookupLib(object):
 
         Args:
             callsign (string): Amateur Radio callsign
-            timestamp (datetime, optional): datetime in UTC (tzinfo=pytz.UTC)
+            timestamp (datetime, optional): datetime in UTC (tzinfo=timezone.utc)
 
         Returns:
             bool: True if a record exists for this callsign (at the given time)
@@ -568,13 +564,12 @@ class LookupLib(object):
            The following code checks the Clublog XML database if the operation is valid for two dates.
 
            >>> from pyhamtools import LookupLib
-           >>> from datetime import datetime
-           >>> import pytz
+           >>> from datetime import datetime, timezone
            >>> my_lookuplib = LookupLib(lookuptype="clublogxml", apikey="myapikey")
            >>> print my_lookuplib.is_invalid_operation("5W1CFN")
            True
            >>> try:
-           >>>   timestamp = datetime(year=2012, month=1, day=31).replace(tzinfo=pytz.UTC)
+           >>>   timestamp = datetime(year=2012, month=1, day=31, tzinfo=timezone.utc)
            >>>   my_lookuplib.is_invalid_operation("5W1CFN", timestamp)
            >>> except KeyError:
            >>>   print "Seems to be invalid operation before 31.1.2012"
@@ -590,7 +585,7 @@ class LookupLib(object):
 
         callsign = callsign.strip().upper()
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         if self._lookuptype == "clublogxml":
 
@@ -644,7 +639,7 @@ class LookupLib(object):
 
         Args:
         callsign (string): Amateur radio callsign
-        timestamp (datetime, optional): datetime in UTC (tzinfo=pytz.UTC)
+        timestamp (datetime, optional): datetime in UTC (tzinfo=timezone.utc)
 
         Returns:
             int: Value of the the CQ Zone exception which exists for this callsign (at the given time)
@@ -674,7 +669,7 @@ class LookupLib(object):
 
         callsign = callsign.strip().upper()
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         if self._lookuptype == "clublogxml":
 
@@ -703,7 +698,7 @@ class LookupLib(object):
         }
 
         if timestamp is None:
-            timestamp = datetime.utcnow().replace(tzinfo=UTC)
+            timestamp = datetime.now(timezone.utc)
 
         if sys.version_info.major == 3:
             encodeurl = url + "?" + urllib.parse.urlencode(params)
@@ -889,12 +884,12 @@ class LookupLib(object):
             lookup[const.LAND] = root.Callsign.land.text
         if root.Callsign.efdate:
             try:
-                lookup[const.EFDATE] = datetime.strptime(root.Callsign.efdate.text, '%Y-%m-%d').replace(tzinfo=UTC)
+                lookup[const.EFDATE] = datetime.strptime(root.Callsign.efdate.text, '%Y-%m-%d').replace(tzinfo=timezone.utc)
             except ValueError:
                 self._logger.debug("[QRZ.com] efdate: Invalid DateTime; " + callsign + " " + root.Callsign.efdate.text)
         if root.Callsign.expdate:
             try:
-                lookup[const.EXPDATE] = datetime.strptime(root.Callsign.expdate.text, '%Y-%m-%d').replace(tzinfo=UTC)
+                lookup[const.EXPDATE] = datetime.strptime(root.Callsign.expdate.text, '%Y-%m-%d').replace(tzinfo=timezone.utc)
             except ValueError:
                 self._logger.debug("[QRZ.com] expdate: Invalid DateTime; " + callsign + " " + root.Callsign.expdate.text)
         if root.Callsign.p_call:
@@ -915,7 +910,7 @@ class LookupLib(object):
             lookup[const.BIO] = root.Callsign.bio.text
         if root.Callsign.biodate:
             try:
-                lookup[const.BIODATE] = datetime.strptime(root.Callsign.biodate.text, '%Y-%m-%d %H:%M:%S').replace(tzinfo=UTC)
+                lookup[const.BIODATE] = datetime.strptime(root.Callsign.biodate.text, '%Y-%m-%d %H:%M:%S').replace(tzinfo=timezone.utc)
             except ValueError:
                 self._logger.warning("[QRZ.com] biodate: Invalid DateTime; " + callsign)
         if root.Callsign.image:
@@ -926,7 +921,7 @@ class LookupLib(object):
             lookup[const.SERIAL] = long(root.Callsign.serial.text)
         if root.Callsign.moddate:
             try:
-                lookup[const.MODDATE] = datetime.strptime(root.Callsign.moddate.text, '%Y-%m-%d %H:%M:%S').replace(tzinfo=UTC)
+                lookup[const.MODDATE] = datetime.strptime(root.Callsign.moddate.text, '%Y-%m-%d %H:%M:%S').replace(tzinfo=timezone.utc)
             except ValueError:
                 self._logger.warning("[QRZ.com] moddate: Invalid DateTime; " + callsign)
         if root.Callsign.MSA:
@@ -1134,7 +1129,7 @@ class LookupLib(object):
             if cty_date:
                 cty_date = cty_date.group(0).replace("date=", "").replace("'", "")
                 cty_date = datetime.strptime(cty_date[:19], '%Y-%m-%dT%H:%M:%S')
-                cty_date.replace(tzinfo=UTC)
+                cty_date.replace(tzinfo=timezone.utc)
                 cty_header["Date"] = cty_date
 
             cty_ns = re.search("xmlns='.+[']", raw_header)
@@ -1233,10 +1228,10 @@ class LookupLib(object):
                             entity[const.LATITUDE] = float(item.text)
                         elif item.tag == "start":
                             dt = datetime.strptime(item.text[:19], '%Y-%m-%dT%H:%M:%S')
-                            entity[const.START] = dt.replace(tzinfo=UTC)
+                            entity[const.START] = dt.replace(tzinfo=timezone.utc)
                         elif item.tag == "end":
                             dt = datetime.strptime(item.text[:19], '%Y-%m-%dT%H:%M:%S')
-                            entity[const.END] = dt.replace(tzinfo=UTC)
+                            entity[const.END] = dt.replace(tzinfo=timezone.utc)
                         elif item.tag == "whitelist":
                             if item.text == "TRUE":
                                 entity[const.WHITELIST] = True
@@ -1244,10 +1239,10 @@ class LookupLib(object):
                                 entity[const.WHITELIST] = False
                         elif item.tag == "whitelist_start":
                             dt = datetime.strptime(item.text[:19], '%Y-%m-%dT%H:%M:%S')
-                            entity[const.WHITELIST_START] = dt.replace(tzinfo=UTC)
+                            entity[const.WHITELIST_START] = dt.replace(tzinfo=timezone.utc)
                         elif item.tag == "whitelist_end":
                             dt = datetime.strptime(item.text[:19], '%Y-%m-%dT%H:%M:%S')
-                            entity[const.WHITELIST_END] = dt.replace(tzinfo=UTC)
+                            entity[const.WHITELIST_END] = dt.replace(tzinfo=timezone.utc)
                 except AttributeError:
                     self._logger.error("Error while processing: ")
                 entities[int(cty_entity[0].text)] = entity
@@ -1281,10 +1276,10 @@ class LookupLib(object):
                         call_exception[const.LATITUDE] = float(item.text)
                     elif item.tag == "start":
                         dt = datetime.strptime(item.text[:19], '%Y-%m-%dT%H:%M:%S')
-                        call_exception[const.START] = dt.replace(tzinfo=UTC)
+                        call_exception[const.START] = dt.replace(tzinfo=timezone.utc)
                     elif item.tag == "end":
                         dt = datetime.strptime(item.text[:19], '%Y-%m-%dT%H:%M:%S')
-                        call_exception[const.END] = dt.replace(tzinfo=UTC)
+                        call_exception[const.END] = dt.replace(tzinfo=timezone.utc)
                     call_exceptions[int(cty_exception.attrib["record"])] = call_exception
 
             self._logger.debug(str(len(call_exceptions))+" Exceptions added")
@@ -1322,10 +1317,10 @@ class LookupLib(object):
                         prefix[const.LATITUDE] = float(item.text)
                     elif item.tag == "start":
                         dt = datetime.strptime(item.text[:19], '%Y-%m-%dT%H:%M:%S')
-                        prefix[const.START] = dt.replace(tzinfo=UTC)
+                        prefix[const.START] = dt.replace(tzinfo=timezone.utc)
                     elif item.tag == "end":
                         dt = datetime.strptime(item.text[:19], '%Y-%m-%dT%H:%M:%S')
-                        prefix[const.END] = dt.replace(tzinfo=UTC)
+                        prefix[const.END] = dt.replace(tzinfo=timezone.utc)
                     prefixes[int(cty_prefix.attrib["record"])] = prefix
 
             self._logger.debug(str(len(prefixes))+" Prefixes added")
@@ -1348,10 +1343,10 @@ class LookupLib(object):
 
                     elif item.tag == "start":
                         dt = datetime.strptime(item.text[:19], '%Y-%m-%dT%H:%M:%S')
-                        invalid_operation[const.START] = dt.replace(tzinfo=UTC)
+                        invalid_operation[const.START] = dt.replace(tzinfo=timezone.utc)
                     elif item.tag == "end":
                         dt = datetime.strptime(item.text[:19], '%Y-%m-%dT%H:%M:%S')
-                        invalid_operation[const.END] = dt.replace(tzinfo=UTC)
+                        invalid_operation[const.END] = dt.replace(tzinfo=timezone.utc)
                     invalid_operations[int(cty_inv_operation.attrib["record"])] = invalid_operation
 
             self._logger.debug(str(len(invalid_operations))+" Invalid Operations added")
@@ -1377,10 +1372,10 @@ class LookupLib(object):
                         zoneException[const.CQZ] = int(item.text)
                     elif item.tag == "start":
                         dt = datetime.strptime(item.text[:19], '%Y-%m-%dT%H:%M:%S')
-                        zoneException[const.START] = dt.replace(tzinfo=UTC)
+                        zoneException[const.START] = dt.replace(tzinfo=timezone.utc)
                     elif item.tag == "end":
                         dt = datetime.strptime(item.text[:19], '%Y-%m-%dT%H:%M:%S')
-                        zoneException[const.END] = dt.replace(tzinfo=UTC)
+                        zoneException[const.END] = dt.replace(tzinfo=timezone.utc)
                     zone_exceptions[int(cty_zone_exception.attrib["record"])] = zoneException
 
             self._logger.debug(str(len(zone_exceptions))+" Zone Exceptions added")
@@ -1533,13 +1528,13 @@ class LookupLib(object):
             elif item == const.LONGITUDE:
                 my_dict[item] = float(my_dict[item])
             elif item == const.START:
-                my_dict[item] = datetime.strptime(my_dict[item], '%Y-%m-%d%H:%M:%S').replace(tzinfo=UTC)
+                my_dict[item] = datetime.strptime(my_dict[item], '%Y-%m-%d%H:%M:%S').replace(tzinfo=timezone.utc)
             elif item == const.END:
-                my_dict[item] = datetime.strptime(my_dict[item], '%Y-%m-%d%H:%M:%S').replace(tzinfo=UTC)
+                my_dict[item] = datetime.strptime(my_dict[item], '%Y-%m-%d%H:%M:%S').replace(tzinfo=timezone.utc)
             elif item == const.WHITELIST_START:
-                my_dict[item] = datetime.strptime(my_dict[item], '%Y-%m-%d%H:%M:%S').replace(tzinfo=UTC)
+                my_dict[item] = datetime.strptime(my_dict[item], '%Y-%m-%d%H:%M:%S').replace(tzinfo=timezone.utc)
             elif item == const.WHITELIST_END:
-                my_dict[item] = datetime.strptime(my_dict[item], '%Y-%m-%d%H:%M:%S').replace(tzinfo=UTC)
+                my_dict[item] = datetime.strptime(my_dict[item], '%Y-%m-%d%H:%M:%S').replace(tzinfo=timezone.utc)
             elif item == const.WHITELIST:
                 my_dict[item] = self._str_to_bool(my_dict[item])
             else:
diff --git a/setup.py b/setup.py
index e8a2284..b26f642 100755
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,6 @@ setup(name='pyhamtools',
       package_data={'': ['countryfilemapping.json']},
       packages=['pyhamtools'],
       install_requires=[
-          "pytz>=2019.1",
           "requests>=2.21.0",
           "ephem>=4.1.3",
           "beautifulsoup4>=4.7.1",
diff --git a/test/test_callinfo.py b/test/test_callinfo.py
index e7331a1..2d20541 100644
--- a/test/test_callinfo.py
+++ b/test/test_callinfo.py
@@ -1,14 +1,10 @@
 # -*- coding: utf-8 -*- 
-from datetime import datetime
+from datetime import datetime, timezone
 
 import pytest
-import pytz
 
 from pyhamtools.consts import LookupConventions as const
 
-UTC = pytz.UTC
-
-
 response_prefix_DH_clublog = {
     'country': 'FEDERAL REPUBLIC OF GERMANY',
     'adif': 230,
@@ -389,7 +385,7 @@ class Test_callinfo_methods:
         if fix_callinfo._lookuplib._lookuptype == "clublogxml" or fix_callinfo._lookuplib._lookuptype == "clublogapi":
             assert fix_callinfo.get_all("DH1TW") == response_prefix_DH_clublog
             assert fix_callinfo.get_all("ci8aw") == response_zone_exception_ci8aw
-            timestamp = datetime(year=2016, month=1, day=20, tzinfo=UTC)
+            timestamp = datetime(year=2016, month=1, day=20, tzinfo=timezone.utc)
             assert fix_callinfo.get_all("VP8STI", timestamp) == response_Exception_VP8STI_with_start_and_stop_date
 
         elif fix_callinfo._lookuplib._lookuptype == "countryfile":
diff --git a/test/test_dxcluster.py b/test/test_dxcluster.py
index 4092978..afb6dcb 100644
--- a/test/test_dxcluster.py
+++ b/test/test_dxcluster.py
@@ -1,15 +1,9 @@
 import pytest
-from datetime import datetime
-
-
-import pytz
-
+from datetime import datetime, timezone
 
 from pyhamtools.consts import LookupConventions as const
 from pyhamtools.dxcluster import decode_char_spot, decode_pc11_message, decode_pc61_message
 
-UTC = pytz.UTC
-
 fix_spot1 = "DX de CT3FW:     21004.8  HC2AO        599 TKS(CW)QSL READ,QRZ.COM    2132Z"
 fix_spot1_broken_spotter_call = "DX de $QRM:     21004.8  HC2AO        599 TKS(CW)QSL READ,QRZ.COM    2132Z"
 
@@ -34,7 +28,7 @@ response_spot1 = {
     const.BAND: 15,
     const.MODE: "CW",
     const.COMMENT: "599 TKS(CW)QSL READ,QRZ.COM",
-    const.TIME: datetime.utcnow().replace( hour=21, minute=32, second=0, microsecond = 0, tzinfo=UTC)
+    const.TIME: datetime.now(timezone.utc).replace(hour=21, minute=32, second=0, microsecond = 0)
 }
 
 
diff --git a/test/test_locator_sunrise_sunset.py b/test/test_locator_sunrise_sunset.py
index a11b6b8..caf73ad 100644
--- a/test/test_locator_sunrise_sunset.py
+++ b/test/test_locator_sunrise_sunset.py
@@ -1,12 +1,9 @@
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 
 import pytest
-import pytz
 
 from pyhamtools.locator import calculate_sunrise_sunset
 
-UTC = pytz.UTC
-
 class Test_calculate_sunrise_sunset_normal_case():
 
     def test_calculate_sunrise_sunset(self):
@@ -14,11 +11,11 @@ class Test_calculate_sunrise_sunset_normal_case():
         time_margin = timedelta(minutes=1)
         locator = "JN48QM"
 
-        test_time =  datetime(year=2014, month=1, day=1, tzinfo=UTC)
-        result_JN48QM_1_1_2014_evening_dawn = datetime(2014, 1, 1, 15, 38, tzinfo=UTC)
-        result_JN48QM_1_1_2014_morning_dawn = datetime(2014, 1, 1, 6, 36,  tzinfo=UTC)
-        result_JN48QM_1_1_2014_sunrise = datetime(2014, 1, 1, 7, 14, tzinfo=UTC)
-        result_JN48QM_1_1_2014_sunset = datetime(2014, 1, 1, 16, 15, 23, 31016, tzinfo=UTC)
+        test_time =  datetime(year=2014, month=1, day=1, tzinfo=timezone.utc)
+        result_JN48QM_1_1_2014_evening_dawn = datetime(2014, 1, 1, 15, 38, tzinfo=timezone.utc)
+        result_JN48QM_1_1_2014_morning_dawn = datetime(2014, 1, 1, 6, 36,  tzinfo=timezone.utc)
+        result_JN48QM_1_1_2014_sunrise = datetime(2014, 1, 1, 7, 14, tzinfo=timezone.utc)
+        result_JN48QM_1_1_2014_sunset = datetime(2014, 1, 1, 16, 15, 23, 31016, tzinfo=timezone.utc)
 
         assert calculate_sunrise_sunset(locator, test_time)['morning_dawn'] - result_JN48QM_1_1_2014_morning_dawn < time_margin
         assert calculate_sunrise_sunset(locator, test_time)['evening_dawn'] - result_JN48QM_1_1_2014_evening_dawn < time_margin
@@ -33,7 +30,7 @@ class Test_calculate_sunrise_sunset_normal_case():
         # The sun never rises in winter time close to the north pole (e.g. at Jan Mayen)
         # Therefore we expect no sunrise or sunset. 
 
-        test_time =  datetime(year=2021, month=12, day=15, tzinfo=UTC)
+        test_time =  datetime(year=2021, month=12, day=15, tzinfo=timezone.utc)
 
         assert calculate_sunrise_sunset(locator, test_time)['morning_dawn'] == None
         assert calculate_sunrise_sunset(locator, test_time)['evening_dawn'] == None
@@ -48,7 +45,7 @@ class Test_calculate_sunrise_sunset_normal_case():
         # The sun never sets at the south pole during arctic summer 
         # Therefore we expect no sunrise or sunset. 
 
-        test_time =  datetime(year=2014, month=1, day=1, tzinfo=UTC)
+        test_time =  datetime(year=2014, month=1, day=1, tzinfo=timezone.utc)
 
         assert calculate_sunrise_sunset(locator, test_time)['morning_dawn'] == None
         assert calculate_sunrise_sunset(locator, test_time)['evening_dawn'] == None
diff --git a/test/test_lookuplib_clublogapi.py b/test/test_lookuplib_clublogapi.py
index 1af3673..f30bd67 100644
--- a/test/test_lookuplib_clublogapi.py
+++ b/test/test_lookuplib_clublogapi.py
@@ -1,5 +1,5 @@
 import pytest
-from datetime import datetime
+from datetime import datetime, timezone
 
 from pyhamtools.lookuplib import LookupLib
 
@@ -84,7 +84,7 @@ class TestclublogApi_Getters:
     def test_lookup_callsign(self, fixClublogApi):
         assert fixClublogApi.lookup_callsign("DH1TW") == response_Exception_DH1TW
         assert fixClublogApi.lookup_callsign("VU9KV") == response_Exception_VU9KV
-        d = datetime.utcnow().replace(year=1971, month=4, day=14)
+        d = datetime.now(timezone.utc).replace(year=1971, month=4, day=14)
         assert fixClublogApi.lookup_callsign("VU9KV", d) == response_Exception_VU9KV_with_Date
         assert fixClublogApi.lookup_callsign("DH1TW/MM") == response_Exception_DH1TW_MM
         assert fixClublogApi.lookup_callsign("DH1TW/AM") == response_Exception_DH1TW_AM
diff --git a/test/test_lookuplib_clublogxml.py b/test/test_lookuplib_clublogxml.py
index c975cd2..5241729 100644
--- a/test/test_lookuplib_clublogxml.py
+++ b/test/test_lookuplib_clublogxml.py
@@ -1,13 +1,10 @@
 import pytest
-from datetime import datetime
-import pytz
+from datetime import datetime, timezone
 import os
 
 from pyhamtools.lookuplib import LookupLib
 from pyhamtools.exceptions import APIKeyMissingError
 
-UTC = pytz.UTC
-
 
 #Fixtures
 #===========================================================
@@ -142,40 +139,40 @@ class TestclublogXML_Getters:
     #===============================
 
     def test_lookup_callsign_same_callsign_different_exceptions(self, fixClublogXML):
-        timestamp = datetime(year=1990, month=10, day=12, tzinfo=UTC)
+        timestamp = datetime(year=1990, month=10, day=12, tzinfo=timezone.utc)
         assert fixClublogXML.lookup_callsign("kc6mm", timestamp) == response_Exception_KC6MM_1990
 
-        timestamp = datetime(year=1992, month=3, day=8, tzinfo=UTC)
+        timestamp = datetime(year=1992, month=3, day=8, tzinfo=timezone.utc)
         assert fixClublogXML.lookup_callsign("kc6mm", timestamp) == response_Exception_KC6MM_1992
 
     def test_lookup_callsign_exception_only_with_start_date(self, fixClublogXML):
         #timestamp > startdate
-        timestamp = datetime(year=1962, month=7, day=7, tzinfo=UTC)
+        timestamp = datetime(year=1962, month=7, day=7, tzinfo=timezone.utc)
         assert fixClublogXML.lookup_callsign("vk9xo", timestamp) == response_Exception_VK9XO_with_start_date
         assert fixClublogXML.lookup_callsign("vk9xo") == response_Exception_VK9XO_with_start_date
 
         #timestamp < startdate
-        timestamp = datetime(year=1962, month=7, day=5, tzinfo=UTC)
+        timestamp = datetime(year=1962, month=7, day=5, tzinfo=timezone.utc)
         with pytest.raises(KeyError):
             fixClublogXML.lookup_callsign("vk9xo", timestamp)
 
     def test_lookup_callsign_exception_only_with_end_date(self, fixClublogXML):
 
         #timestamp < enddate
-        timestamp = datetime(year=1975, month=9, day=14, tzinfo=UTC)
+        timestamp = datetime(year=1975, month=9, day=14, tzinfo=timezone.utc)
         assert fixClublogXML.lookup_callsign("vk9xx", timestamp) == response_Exception_VK9XX_with_end_date
 
         # timestamp > enddate
         with pytest.raises(KeyError):
             fixClublogXML.lookup_callsign("vk9xx")
 
-        timestamp = datetime(year=1975, month=9, day=16, tzinfo=UTC)
+        timestamp = datetime(year=1975, month=9, day=16, tzinfo=timezone.utc)
         with pytest.raises(KeyError):
             fixClublogXML.lookup_callsign("vk9xx", timestamp)
 
     def test_lookup_callsign_exception_no_start_nor_end_date(self, fixClublogXML):
 
-        timestamp = datetime(year=1975, month=9, day=14, tzinfo=UTC)
+        timestamp = datetime(year=1975, month=9, day=14, tzinfo=timezone.utc)
         assert fixClublogXML.lookup_callsign("ax9nyg", timestamp) == response_Exception_AX9NYG
         assert fixClublogXML.lookup_callsign("ax9nyg" ) == response_Exception_AX9NYG
 
@@ -196,29 +193,29 @@ class TestclublogXML_Getters:
 
     def test_lookup_prefix_with_changing_entities(self, fixClublogXML):
         #return old entity (PAPUA TERR)
-        timestamp = datetime(year=1975, month=9, day=14).replace(tzinfo=UTC)
+        timestamp = datetime(year=1975, month=9, day=14, tzinfo=timezone.utc)
         assert fixClublogXML.lookup_prefix("VK9", timestamp) == response_Prefix_VK9_until_1975
 
         #return empty dict - Prefix was not assigned at that time
-        timestamp = datetime(year=1975, month=9, day=16).replace(tzinfo=UTC)
+        timestamp = datetime(year=1975, month=9, day=16, tzinfo=timezone.utc)
 
         with pytest.raises(KeyError):
             fixClublogXML.lookup_prefix("VK9", timestamp)
 
         #return new entity (Norfolk Island)
-        timestamp = datetime.utcnow().replace(tzinfo=UTC)
+        timestamp = datetime.now(timezone.utc)
         assert fixClublogXML.lookup_prefix("VK9", timestamp ) == response_Prefix_VK9_starting_1976
 
     def test_lookup_prefix_with_entities_having_start_and_stop(self, fixClublogXML):
 
-        timestamp_before = datetime(year=1964, month=11, day=1).replace(tzinfo=UTC)
+        timestamp_before = datetime(year=1964, month=11, day=1, tzinfo=timezone.utc)
         with pytest.raises(KeyError):
             fixClublogXML.lookup_prefix("ZD5", timestamp_before)
 
-        timestamp_valid = datetime(year=1964, month=12, day=2).replace(tzinfo=UTC)
+        timestamp_valid = datetime(year=1964, month=12, day=2, tzinfo=timezone.utc)
         assert fixClublogXML.lookup_prefix("ZD5", timestamp_valid) == response_Prefix_ZD5_1964_to_1971
 
-        timestamp_after = datetime(year=1971, month=8, day=1).replace(tzinfo=UTC)
+        timestamp_after = datetime(year=1971, month=8, day=1, tzinfo=timezone.utc)
         with pytest.raises(KeyError):
             fixClublogXML.lookup_prefix("ZD5", timestamp_after)
 
@@ -234,8 +231,8 @@ class TestclublogXML_Getters:
             fixClublogXML.is_invalid_operation("dh1tw")
 
         #Invalid Operation with start and end date
-        timestamp_before = datetime(year=1993, month=12, day=30).replace(tzinfo=UTC)
-        timestamp = datetime(year=1994, month=12, day=30).replace(tzinfo=UTC)
+        timestamp_before = datetime(year=1993, month=12, day=30, tzinfo=timezone.utc)
+        timestamp = datetime(year=1994, month=12, day=30, tzinfo=timezone.utc)
         with pytest.raises(KeyError):
             fixClublogXML.is_invalid_operation("vk0mc")
 
@@ -246,7 +243,7 @@ class TestclublogXML_Getters:
 
         #Invalid Operation with start date
         assert fixClublogXML.is_invalid_operation("5W1CFN")
-        timestamp_before = datetime(year=2012, month=1, day=31).replace(tzinfo=UTC)
+        timestamp_before = datetime(year=2012, month=1, day=31, tzinfo=timezone.utc)
         with pytest.raises(KeyError):
             fixClublogXML.is_invalid_operation("5W1CFN", timestamp_before)
 
@@ -264,9 +261,9 @@ class TestclublogXML_Getters:
         assert fixClublogXML.lookup_zone_exception("dp0gvn") == 38
 
         #zone exception with start and end date
-        timestamp = datetime(year=1992, month=10, day=2).replace(tzinfo=UTC)
-        timestamp_before = datetime(year=1992, month=9, day=30).replace(tzinfo=UTC)
-        timestamp_after = datetime(year=1993, month=3, day=1).replace(tzinfo=UTC)
+        timestamp = datetime(year=1992, month=10, day=2, tzinfo=timezone.utc)
+        timestamp_before = datetime(year=1992, month=9, day=30, tzinfo=timezone.utc)
+        timestamp_after = datetime(year=1993, month=3, day=1, tzinfo=timezone.utc)
         assert fixClublogXML.lookup_zone_exception("dl1kvc/p", timestamp) == 38
 
         with pytest.raises(KeyError):
@@ -276,6 +273,6 @@ class TestclublogXML_Getters:
             fixClublogXML.lookup_zone_exception("dl1kvc/p", timestamp_after)
 
         #zone exception with start date
-        timestamp_before = datetime(year=2013, month=12, day=26).replace(tzinfo=UTC)
+        timestamp_before = datetime(year=2013, month=12, day=26,tzinfo=timezone.utc)
         with pytest.raises(KeyError):
             fixClublogXML.lookup_zone_exception("dh1hb/p", timestamp_before)
diff --git a/test/test_lookuplib_qrz.py b/test/test_lookuplib_qrz.py
index 8a4476e..b63cc4b 100644
--- a/test/test_lookuplib_qrz.py
+++ b/test/test_lookuplib_qrz.py
@@ -1,16 +1,12 @@
 import os
 
 import pytest
-from datetime import datetime
+from datetime import datetime, timezone
 
 from pyhamtools.lookuplib import LookupLib
 from pyhamtools.exceptions import APIKeyMissingError
 from pyhamtools.consts import LookupConventions as const
 
-import pytz
-UTC = pytz.UTC
-
-
 try:
     QRZ_USERNAME = str(os.environ['QRZ_USERNAME'])
     QRZ_PWD = str(os.environ['QRZ_PWD'])
@@ -21,10 +17,10 @@ except Exception:
 #===========================================================
 
 response_1A1AB = {
-    u'biodate': datetime(2018, 9, 7, 21, 17, 7, tzinfo=UTC),
+    u'biodate': datetime(2018, 9, 7, 21, 17, 7, tzinfo=timezone.utc),
     u'bio': u'0',
     u'license_class': u'C',
-    u'moddate': datetime(2008, 11, 2, 15, 0, 38, tzinfo=UTC),
+    u'moddate': datetime(2008, 11, 2, 15, 0, 38, tzinfo=timezone.utc),
     u'locator': u'JN61fw',
     u'callsign': u'1A1AB',
     u'addr2': u'00187  Rome',
diff --git a/test/test_lookuplib_redis.py b/test/test_lookuplib_redis.py
index 2ccb0dc..b244c3c 100644
--- a/test/test_lookuplib_redis.py
+++ b/test/test_lookuplib_redis.py
@@ -1,15 +1,11 @@
 import pytest
 import json
-from datetime import datetime
+from datetime import datetime, timezone
 
-import pytz
 import redis
 
 from pyhamtools import LookupLib, Callinfo
 
-
-UTC = pytz.UTC
-
 r = redis.Redis()
 
 
@@ -44,7 +40,7 @@ class TestStoreDataInRedis:
         with pytest.raises(KeyError):
             fix_redis.is_invalid_operation("VK0MC")
 
-        timestamp = datetime(year=1994, month=12, day=30).replace(tzinfo=UTC)
+        timestamp = datetime(year=1994, month=12, day=30, tzinfo=timezone.utc)
         assert fix_redis.is_invalid_operation("VK0MC", timestamp)
 
         with pytest.raises(KeyError):
@@ -61,7 +57,7 @@ class TestStoreDataInRedis:
         assert lib.lookup_prefix("DH") == fixCountryFile.lookup_prefix("DH")
 
     def test_redis_lookup(self, fixClublogXML, fix_redis):
-        timestamp = datetime(year=2016, month=1, day=20, tzinfo=UTC)
+        timestamp = datetime(year=2016, month=1, day=20, tzinfo=timezone.utc)
         ci = Callinfo(fix_redis)
         assert ci.get_all("VP8STI", timestamp) == response_Exception_VP8STI_with_start_and_stop_date
         assert ci.get_all("tu5pct") == response_TU5PCT