Bug to convert jalali to gegorian and again convert it to jalali

[vahidtwo]

Please include your runtime information

Hi i have AJIB issue
i try to use jdatetime to convert tehran jalali time to geogorian time (utc)
i wtite this code

tehran_timezone = pytz.timezone('Asia/Tehran')
z=jdatetime.datetime(1403, 2, 28, 15, 16, 13, tzinfo=tehran_timezone).togregorian().astimezone(tz=UTC)
jdatetime.datetime.fromgregorian(datetime=z).astimezone(tehran_timezone)
>>> jdatetime.datetime(1403, 2, 28, 15, 20, 13, 0, tzinfo=Asia/Tehran)

as u see the minute convert from 16 to 20
and it is a bug

• jdatetime version:4.1.1
• Python version:3.8
• OS: debian

[5j9]

I don't use pytz, but this could be a pytz issue because if you run the same code using datetime instead of jdatetime you'll get the same result.

If you can upgrade your Python, try using the zoneinfo module from the standard library, it was added in Python 3.9. It works as expected for me. Sample code:

import datetime
import pytz
from datetime import UTC
from zoneinfo import ZoneInfo


def try_tz(tehran_timezone):
    tehran_dt = datetime.datetime(2024, 2, 28, 15, 16, 13, tzinfo=tehran_timezone)
    print(tehran_dt)
    tehran_to_utc = tehran_dt.astimezone(UTC)
    print(tehran_to_utc)
    back_to_tehran = tehran_to_utc.astimezone(tehran_timezone)
    print(back_to_tehran)

try_tz(pytz.timezone("Asia/Tehran"))
print()
try_tz(ZoneInfo("Asia/Tehran"))

[5j9]

Similar pytz issues:

• Incorrect Tz conversion adding extra minutes. stub42/pytz#120
• Problem with timezone conversion when using pytz as tzinfo stub42/pytz#107