[pywin32-bugs] [ pywin32-Bugs-3523104 ] TimeZoneInfo does not convert timezones correctly

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Bugs item #3523104, was opened at 2012-05-02 13:01
Message generated for change (Tracker Item Submitted) made by bmatthews27
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Category: win32timezone
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Brian Matthews (bmatthews27)
Assigned to: Jason R. Coombs (jaraco)
Summary: TimeZoneInfo does not convert timezones correctly

Initial Comment:
in the following example two dates are converted from Hawaii time zone to Pacific time zone. In both cases the time difference should be 3 hours.
The first is correct, the second is incorrect

>>> from win32timezone import TimeZoneInfo
>>> from datetime import datetime
>>> tzi = TimeZoneInfo('Hawaiian Standard Time')
>>> tzs = TimeZoneInfo('Pacific Standard Time')
>>> dthaw = datetime(2011, 11, 5, 15, 59, 59, 0, tzinfo=tzi)
>>> print dthaw.timetuple()
time.struct_time(tm_year=2011, tm_mon=11, tm_mday=5, tm_hour=15, tm_min=59, tm_sec=59, tm_wday=5, tm_yday=309, tm_isdst=0)
>>> dtpac = dthaw.astimezone(tzs)
>>> print dtpac.timetuple()
time.struct_time(tm_year=2011, tm_mon=11, tm_mday=5, tm_hour=18, tm_min=59, tm_sec=59, tm_wday=5, tm_yday=309, tm_isdst=1)
>>>
>>> dthaw = datetime(2011, 11, 5, 16, 0, 0, 0, tzinfo=tzi)
>>> print dthaw.timetuple()
time.struct_time(tm_year=2011, tm_mon=11, tm_mday=5, tm_hour=16, tm_min=0, tm_sec=0, tm_wday=5, tm_yday=309, tm_isdst=0)
>>> dtpac = dthaw.astimezone(tzs)
>>> print dtpac.timetuple()
time.struct_time(tm_year=2011, tm_mon=11, tm_mday=5, tm_hour=17, tm_min=0, tm_sec=0, tm_wday=5, tm_yday=309, tm_isdst=1)
>>>



 

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