详细描述
The time zone offset data for a given moment in time, i.e. the time zone offsets and abbreviation to use at that moment in time.
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OffsetData::atUtc The datetime of the offset data in UTC time.
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OffsetData::offsetFromUtc The total offset from UTC in effect at the datetime.
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OffsetData::standardTimeOffset The standard time offset component of the total offset.
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OffsetData::daylightTimeOffset The DST offset component of the total offset.
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OffsetData::abbreviation The abbreviation in effect at the datetime.
For example, for time zone "Europe/Berlin" the OffsetDate in standard and DST might be: