Index: RTC.c
===================================================================
diff -u -r17198326430351fe763d5faacc554f872092d9de -rb3ae506971faab3e7429dc51eeead3638297d6be
--- RTC.c	(.../RTC.c)	(revision 17198326430351fe763d5faacc554f872092d9de)
+++ RTC.c	(.../RTC.c)	(revision b3ae506971faab3e7429dc51eeead3638297d6be)
@@ -856,13 +856,12 @@
 {
     struct tm *ptm;
 
-    // Convert epoch to C library equivalent
-    epoch -= YEAR_1900_TO_1970_SECONDS_DIFF;
     // Convert epoch to date/time structure
+    epoch += YEAR_1900_TO_1970_SECONDS_DIFF;
     ptm = gmtime( &epoch );
     // Copy date/time stamp to our structure
-    RTCNewTimestampStruct.years = ptm->tm_year;
-    RTCNewTimestampStruct.months = ptm->tm_mon;
+    RTCNewTimestampStruct.years = ptm->tm_year + EPOCH_YEAR;  // epoch is seconds from 1/1/1900.
+    RTCNewTimestampStruct.months = ptm->tm_mon + 1;           // months from gmtime() are 0..11 - convert to 1..12.
     RTCNewTimestampStruct.days = ptm->tm_mday;
     RTCNewTimestampStruct.hours = ptm->tm_hour;
     RTCNewTimestampStruct.minutes = ptm->tm_min;