Use a real bool for a flag option.

Lib/logging/handlers.py

@@ -155,7 +155,7 @@ class TimedRotatingFileHandler(BaseRotatingHandler):
     If backupCount is > 0, when rollover is done, no more than backupCount
     files are kept - the oldest ones are deleted.
     """
-    def __init__(self, filename, when='h', interval=1, backupCount=0, encoding=None, delay=0, utc=0):
+    def __init__(self, filename, when='h', interval=1, backupCount=0, encoding=None, delay=0, utc=False):
         BaseRotatingHandler.__init__(self, filename, 'a', encoding, delay)
         self.when = when.upper()
         self.backupCount = backupCount