--- vcpx/bzr.py.orig
+++ vcpx/bzr.py
@@ -180,7 +180,7 @@
         """
         Commit the changeset.
         """
-        from time import mktime
+        from time import mktime, gmtime
         from binascii import hexlify
         from re import search
         from bzrlib.osutils import compact_date, rand_bytes
@@ -196,7 +196,23 @@
         else:
             self.log.info('Committing...')
             logmessage = "Empty changelog"
-        timestamp = int(mktime(date.timetuple()))
+
+        t_l = int(mktime(date.timetuple()))
+        t_u = int(mktime(date.utctimetuple()))
+
+        if not date.tzinfo:
+            timezone  = t_u - mktime(gmtime(t_l))
+            timestamp = t_l + timezone
+        else:
+            # XXX I would expect date.utcoffset().seconds to just work, as
+            # in, return a signed number of seconds <= 12*3600. However, the
+            # utcoffset() method of some tzinfo objects as defined by pytz seem
+            # to return eg. timedelta(-1, 68400) instead of timedelta(0, -18000),
+            # thus making the abs() and .days play necessary.  --dato
+            timezone = abs(date.utcoffset()).seconds
+            if date.utcoffset().days == -1:
+                timezone *= -1
+            timestamp = 2*t_u - mktime(gmtime(t_u))
 
         # Guess sane email address
         email = search("<(.*@.*)>", author)
@@ -216,7 +232,7 @@
         self._working_tree.commit(logmessage, committer=author,
                                   specific_files=entries, rev_id=revision_id,
                                   verbose=self.repository.projectref().verbose,
-                                  timestamp=timestamp)
+                                  timestamp=timestamp, timezone=timezone)
 
     def _removePathnames(self, names):
         """