Work with time zones in Nepal¶

sambat.datetime accepts any datetime.tzinfo, including zoneinfo.ZoneInfo. Time-zone calls are made with the equivalent standard-library datetime, so every tzinfo implementation behaves exactly as it does with the standard library.

`NEPAL_TZ`¶

sambat.NEPAL_TZ implements the IANA Asia/Kathmandu zone without needing the tzdata package (useful on Windows and in slim containers):

Period	UTC offset	`tzname()`
until 1920-01-01	+05:41:16 (local mean time)	`LMT`
1920-01-01 to 1986-01-01	+05:30	`+0530`
since 1986-01-01	+05:45	`+0545`

>>> import datetime
>>> from sambat import NEPAL_TZ
>>> datetime.datetime(1980, 1, 1, tzinfo=NEPAL_TZ).utcoffset()
datetime.timedelta(seconds=19800)
>>> datetime.datetime(2026, 1, 1, tzinfo=NEPAL_TZ).tzname()
'+0545'

The 1986 change skipped the wall times 00:00–00:14 on 1 January 1986, and the 1920 change repeated 11 minutes 16 seconds; fold follows PEP 495 for both.

Current time in Nepal¶

>>> import sambat
>>> sambat.now_np().utcoffset()
datetime.timedelta(seconds=20700)

sambat.datetime.now() without an argument returns naive machine-local time, exactly like datetime.datetime.now().

Converting between zones¶

>>> from sambat import datetime as bs_datetime
>>> kathmandu = bs_datetime(2083, 6, 15, 9, 30, tzinfo=NEPAL_TZ)
>>> kathmandu.astimezone(sambat.UTC).isoformat()
'2083-06-15T03:45:00+00:00'