Index: RTC.c
===================================================================
diff -u -r1beb69d9da7309365751da6feaa88f594e704e46 -r88ddc0c6d06cb0d6ceef0a32f9ef08b4e0b28b0e
--- RTC.c	(.../RTC.c)	(revision 1beb69d9da7309365751da6feaa88f594e704e46)
+++ RTC.c	(.../RTC.c)	(revision 88ddc0c6d06cb0d6ceef0a32f9ef08b4e0b28b0e)
@@ -115,6 +115,8 @@
 #define YEAR_2000                           2000U                       ///< Year 2000
 #define EPOCH_YEAR                          1900U                       ///< Reference year to calculate epoch (1900)
 #define YEAR_1900_TO_1970_SECONDS_DIFF      2208988800U                 ///< Difference in seconds from 1/1/1900 to 1/1/1970 (2208988800)
+/// Six hour offset that is apparently needed before converting epoch to date/time structure using gmtime().
+#define OFFSET_6_HRS                        (6 * MIN_PER_HOUR * SEC_PER_MIN)
 
 #ifdef _VECTORCAST_
 #define LOCAL_TO_GTM_TIME_CONVERSION        8U                          ///< Local time to GTM conversion for VectorCAST
@@ -856,6 +858,7 @@
 
     // Convert epoch to date/time structure
     epoch += YEAR_1900_TO_1970_SECONDS_DIFF;
+    epoch -= OFFSET_6_HRS;  // TODO - why is this needed?
     ptm = gmtime( &epoch );
     // Copy date/time stamp to our structure
     RTCNewTimestampStruct.years = ptm->tm_year + EPOCH_YEAR;  // epoch is seconds from 1/1/1900.