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77 lines
1.7 KiB
Python
77 lines
1.7 KiB
Python
from functools import cache
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from scripts.lib.zulip_tools import get_tzdata_zi
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@cache
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def get_canonical_timezone_map() -> dict[str, str]:
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canonical = {}
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with get_tzdata_zi() as f:
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for line in f:
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fields = line.split()
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if fields and "link".startswith(fields[0].lower()): # zic(8) accepts any prefix of Link
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code, name, alias = fields
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canonical[alias] = name
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return canonical
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def canonicalize_timezone(key: str) -> str:
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return get_canonical_timezone_map().get(key, key)
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# Note: some of these abbreviations are fundamentally ambiguous (see
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# zerver/tests/test_timezone.py), so you should never rely on them as
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# anything more than a heuristic.
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common_timezones = {
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"SST": -39600,
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"HST": -36000,
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"AKST": -32400,
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"HDT": -32400,
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"AKDT": -28800,
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"PST": -28800,
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"MST": -25200,
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"PDT": -25200,
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"CST": -21600,
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"MDT": -21600,
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"CDT": -18000,
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"EST": -18000,
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"AST": -14400,
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"EDT": -14400,
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"NST": -12600,
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"ADT": -10800,
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"NDT": -9000,
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"GMT": 0,
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"UTC": 0,
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"WET": 0,
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"BST": +3600,
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"CET": +3600,
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"MET": +3600,
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"WAT": +3600,
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"WEST": +3600,
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"CAT": +7200,
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"CEST": +7200,
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"EET": +7200,
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"MEST": +7200,
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"SAST": +7200,
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"EAT": +10800,
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"EEST": +10800,
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"IDT": +10800,
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"MSK": +10800,
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"PKT": +18000,
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"IST": +19800,
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"WIB": +25200,
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"AWST": +28800,
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"HKT": +28800,
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"WITA": +28800,
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"JST": +32400,
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"KST": +32400,
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"WIT": +32400,
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"ACST": +34200,
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"AEST": +36000,
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"ChST": +36000,
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"ACDT": +37800,
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"AEDT": +39600,
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"NZST": +43200,
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"NZDT": +46800,
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}
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