zulip/tools/setup/build_timezone_values

#!/usr/bin/env python3
import json
import os
import sys

if sys.version_info < (3, 9):
    from backports import zoneinfo
else:
    import zoneinfo

ZULIP_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), "../../")
sys.path.insert(0, ZULIP_PATH)

from zerver.lib.timezone import get_canonical_timezone_map

OUT_PATH = os.path.join(ZULIP_PATH, "web", "generated", "timezones.json")

with open(OUT_PATH, "w") as f:
    json.dump(
        {
            "timezones": sorted(
                zoneinfo.available_timezones()
                - {"Factory", "localtime"}
                - set(get_canonical_timezone_map())
            )
        },
        f,
    )