Commit f6fafc02 authored by Adrian Holovaty's avatar Adrian Holovaty
Browse files

Improved LocalTimezone._isdst() to handle dates before approximately... 

Improved LocalTimezone._isdst() to handle dates before approximately 1901-12-01 (the specific cutoff date is platform-specific). Refs #1443

git-svn-id: http://code.djangoproject.com/svn/django/trunk@7945 bcc190cf-cafb-0310-a4f2-bffc1f526a37
parent c4d0cfe1

django/utils/tzinfo.py

+11 −3
Original line number Diff line number Diff line
@@ -60,9 +60,17 @@ class LocalTimezone(tzinfo): 
        tt = (dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second, dt.weekday(), 0, -1)

        try:

            stamp = time.mktime(tt)

        except OverflowError:

            # 32 bit systems can't handle dates after Jan 2038, so we fake it

            # in that case (since we only care about the DST flag here).

        except (OverflowError, ValueError):

            # 32 bit systems can't handle dates after Jan 2038, and certain

            # systems can't handle dates before ~1901-12-01:

            #

            # >>> time.mktime((1900, 1, 13, 0, 0, 0, 0, 0, 0))

            # OverflowError: mktime argument out of range

            # >>> time.mktime((1850, 1, 13, 0, 0, 0, 0, 0, 0))

            # ValueError: year out of range

            #

            # In this case, we fake the date, because we only care about the

            # DST flag.

            tt = (2037,) + tt[1:]

            stamp = time.mktime(tt)

        tt = time.localtime(stamp)