diff --git a/app/src/main/java/com/geeksville/mesh/ui/components/PositionLog.kt b/app/src/main/java/com/geeksville/mesh/ui/components/PositionLog.kt
index 1cc4c6cfc..af2090713 100644
--- a/app/src/main/java/com/geeksville/mesh/ui/components/PositionLog.kt
+++ b/app/src/main/java/com/geeksville/mesh/ui/components/PositionLog.kt
@@ -17,8 +17,8 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
 import androidx.compose.material.ButtonDefaults
 import androidx.compose.material.ContentAlpha
 import androidx.compose.material.Icon
@@ -55,6 +55,7 @@ import com.geeksville.mesh.ui.theme.AppTheme
 import com.geeksville.mesh.util.metersIn
 import com.geeksville.mesh.util.toString
 import java.text.DateFormat
+import kotlin.time.Duration.Companion.days
 
 @Composable
 private fun RowScope.PositionText(text: String, weight: Float) {
@@ -117,10 +118,26 @@ private fun PositionItem(
             PositionText("${position.groundSpeed} Km/h", Weight15)
             PositionText("%.0f°".format(position.groundTrack * HeadingDeg), Weight15)
         }
-        PositionText(dateFormat.format(position.time * SecondsToMillis), Weight40)
+        PositionText(formatPositionTime(position, dateFormat), Weight40)
     }
 }
 
+@Composable
+private fun formatPositionTime(
+    position: MeshProtos.Position,
+    dateFormat: DateFormat
+): String {
+    val currentTime = System.currentTimeMillis()
+    val sixMonthsAgo = currentTime - 180.days.inWholeMilliseconds
+    val isOlderThanSixMonths = position.time * SecondsToMillis > sixMonthsAgo
+    val timeText = if (isOlderThanSixMonths) {
+        stringResource(id = R.string.unknown_age)
+    } else {
+        dateFormat.format(position.time * SecondsToMillis)
+    }
+    return timeText
+}
+
 @OptIn(ExperimentalLayoutApi::class)
 @Composable
 private fun ActionButtons(
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index e1bec4185..0ed5ff660 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -312,4 +312,5 @@
     <string name="max">Max</string>
     <string name="selected">Selected</string>
     <string name="not_selected">Not Selected</string>
+    <string name="unknown_age">Unknown Age</string>
 </resources>