diff --git a/src/utils.cpp b/src/utils.cpp
new file mode 100644
index 0000000..9ba4f8e
--- /dev/null
+++ b/src/utils.cpp
@@ -0,0 +1,36 @@
+#include "utils.h"
+
+namespace utils {
+
+char *ax25_base91enc(char *s, uint8_t n, uint32_t v) {
+  /* Creates a Base-91 representation of the value in v in the string */
+  /* pointed to by s, n-characters long. String length should be n+1. */
+  for(s += n, *s = '\0'; n; n--) {
+    *(--s) = v % 91 + 33;
+    v /= 91;
+  }
+  return(s);
+}
+
+static String padding(unsigned int number, unsigned int width) {
+    String result;
+    String num(number);
+    if (num.length() > width) {
+        width = num.length();
+    }
+    for (unsigned int i = 0; i < width - num.length(); i++) {
+        result.concat('0');
+    }
+    result.concat(num);
+    return result;
+}
+
+String createDateString(time_t t) {
+    return String(padding(year(t), 4) + "-" + padding(month(t), 2) + "-" + padding(day(t), 2));
+}
+
+String createTimeString(time_t t) {
+    return String(padding(hour(t), 2) + ":" + padding(minute(t), 2) + ":" + padding(second(t), 2));
+}
+
+}
\ No newline at end of file
diff --git a/src/utils.h b/src/utils.h
new file mode 100644
index 0000000..8b992f2
--- /dev/null
+++ b/src/utils.h
@@ -0,0 +1,14 @@
+#ifndef UTILS_H_
+#define UTILS_H_
+
+#include <Arduino.h>
+#include <TimeLib.h>
+
+namespace utils {
+
+char *ax25_base91enc(char *s, uint8_t n, uint32_t v);
+String createDateString(time_t t);
+String createTimeString(time_t t);
+
+}
+#endif
\ No newline at end of file