Index: trunk/FACT++/src/DataWriteFits.cc
===================================================================
--- trunk/FACT++/src/DataWriteFits.cc	(revision 12613)
+++ trunk/FACT++/src/DataWriteFits.cc	(revision 12615)
@@ -246,11 +246,11 @@
         const Time stop (fTstop[0],  fTstop[1]);
 
-        fFile.WriteKey("TSTARTI",  floor(start.Unix()),
+        fFile.WriteKey("TSTARTI",  floor(start.UnixTime()),
                        "Time when first event received (integral part)");
-        fFile.WriteKey("TSTARTF",  modf(start.Unix(), 1),
+        fFile.WriteKey("TSTARTF",  fmod(start.UnixTime(), 1),
                        "Time when first event received (fractional part)");
-        fFile.WriteKey("TSTOPI",   floor(stop.Unix()),
+        fFile.WriteKey("TSTOPI",   floor(stop.UnixTime()),
                        "Time when last event received (integral part)");
-        fFile.WriteKey("TSTOPF",   modf(stop.Unix(), 1),
+        fFile.WriteKey("TSTOPF",   fmod(stop.UnixTime(), 1),
                        "Time when last event received (fractional part)");
         fFile.WriteKey("DATE-OBS", start.Iso(),