call make_python_month_gtk_month in a place

src/history_window.py

@@ -135,6 +135,7 @@ def __init__(self, jid, account):
 			date = time.localtime(tim)
 
 		y, m, d = date[0], date[1], date[2]
+		m = gtkgui_helpers.make_python_month_gtk_month(m)
 		self.calendar.select_month(m, y)
 		self.calendar.select_day(d)
 		self.add_lines_for_date(y, m, d)