import datetime

ZERO = datetime.timedelta(0)


class UTC(datetime.tzinfo):
    def utcoffset(self, dt):
        return ZERO

    def dst(self, dt):
        return ZERO

    def tzname(self, dt):
        return "UTC"


utc = UTC()
mac_epoch = datetime.datetime(1904, 1, 1, 0, 0, 0, 0, utc)
unix_epoch = datetime.datetime(1970, 1, 1, 0, 0, 0, 0, utc)
osx_epoch = datetime.datetime(2001, 1, 1, 0, 0, 0, 0, utc)