Index: trunk/Mars/mbase/MTime.cc
===================================================================
--- trunk/Mars/mbase/MTime.cc	(revision 15257)
+++ trunk/Mars/mbase/MTime.cc	(revision 17070)
@@ -298,4 +298,7 @@
 // strange offsets. You can get rid of this by calling:
 //    TAxis::SetTimeFormat("[your-format] %F1995-01-01 00:00:00 GMT");
+// Note that an offset of 1970-01-01 does NOT work, because root
+// assumes that this is local time, tries to convert that to UTC,
+// which gives a negative unix time stamp in Europe, and ignores it.
 //
 Double_t MTime::GetAxisTime() const