import pytz, dateutil.parser
# Z is for timezone
gmtTime = dateutil.parser.parse("2011-07-14T6:00:00.000Z")
# To convert naive time to tz-aware time
now-aware = pytz.UTC.localize(naive-time)
# To convert UTC time to localtime
# weird huh? shouldnt it be Asia/Hanoi
localtime = utcTime.astimezone(pytz.timezone("Asia/Ho_Chi_Minh"))
# Create a datetime variable with timezone
start = datetime(1970, 1, 1, tzinfo=pytz.UTC)