exiftool-vendored
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    Variable ArchaicTimezoneOffsetsConst

    ArchaicTimezoneOffsets: readonly [
        "-10:30",
        "-04:30",
        "-00:44",
        "-00:25:21",
        "+00:20",
        "+00:30",
        "+01:24",
        "+01:30",
        "+02:30",
        "+04:51",
        "+05:40",
        "+07:20",
        "+07:30",
    ] = ...

    Archaic timezone offsets that have not been in use since 1982 or earlier