exiftool-vendored
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    Variable ValidTimezoneOffsetsConst

    ValidTimezoneOffsets: readonly [
        "-11:00",
        "-10:00",
        "-09:30",
        "-09:00",
        "-08:30",
        "-08:00",
        "-07:00",
        "-06:00",
        "-05:00",
        "-04:00",
        "-03:30",
        "-03:00",
        "-02:30",
        "-02:00",
        "-01:00",
        "+00:00",
        "+01:00",
        "+02:00",
        "+03:00",
        "+03:30",
        "+04:00",
        "+04:30",
        "+05:00",
        "+05:30",
        "+05:45",
        "+06:00",
        "+06:30",
        "+07:00",
        "+08:00",
        "+08:30",
        "+08:45",
        "+09:00",
        "+09:30",
        "+09:45",
        "+10:00",
        "+10:30",
        "+11:00",
        "+12:00",
        "+12:45",
        "+13:00",
        "+13:45",
        "+14:00",
    ] = ...

    Valid timezone offsets that are currently in use, or used after 1982