diff -r -u hamster-applet-2.29.5/hamster/widgets/dateinput.py hamster-applet-2.29.5.date_tab_fix/hamster/widgets/dateinput.py
--- hamster-applet-2.29.5/hamster/widgets/dateinput.py	2010-01-08 19:17:49.000000000 +0100
+++ hamster-applet-2.29.5.date_tab_fix/hamster/widgets/dateinput.py	2010-01-18 21:03:39.160622436 +0100
@@ -143,7 +143,7 @@
     def _on_key_press_event(self, entry, event):
         if self.popup.get_property("visible"):
             cal_date = self.date_calendar.get_date()
-            date = dt.date(cal_date[0], cal_date[1], cal_date[2])
+            date = dt.date(cal_date[0], cal_date[1]+1, cal_date[2])
         else:
             date = self._figure_date(entry.get_text())
             if not date:
