wrong timezone offset on localize

[Kalyan Bhetwal]

While trying to convert date from local time i.e. Asia/Kathmandu to UTC time, the offset for Kathmandu is taken as +05:41 which is wrong. Below code demonstrates it.

import pytz
from datetime import datetime

date_time = datetime(18,12,28,10,30,19)
utc = pytz.utc
tz = pytz.timezone('Asia/Kathmandu')
dt = tz.localize(date_time)
print dt

The output offset obtained is +05:41 which is wrong since 'Asia/Kathmandu' is +05:45 from UTC

[Kalyan Bhetwal (kbwal)]

This happens particularly for timezone format of datetime(18,12,28,10,30,19). Is there any solutions or fix to the problem

[Brian Park (xparks)]

I suspect the problem is your use of "18" to mean "2018". Your print output probably says "0018-12-28 10:30:19+05:41", which is a good hint. I get the following with the corrected year:

>>> date_time = datetime(2018,12,28,10,30,19)
>>> tz = pytz.timezone('Asia/Kathmandu')
>>> dt = tz.localize(date_time)
>>> print(dt)
2018-12-28 10:30:19+05:45

[Kalyan Bhetwal (kbwal)]

Hi Brian,

Thank you for your reply. I did as you explained above got the correct offset. There are few logs generating devices that generate the logs using such year format. They were creating lots of trouble due to the wrong conversion of log timestamps which are crucial for us to meet our daily compliance needs.

The problem happens only when we use %y(Year without century as a zero-padded decimal number.) format for the year as mentioned in the doc https://docs.python.org/2/library/datetime.html.

Happy New Year 2020.

Kind Regards,
Kalyan