The ZonedDateTime class accommodates this scenario, whereas the OffsetDateTime and OffsetTime classes, which do not have access to the ZoneRules, do not. For example, most time zones experience a gap (typically of 1 hour) when moving the clock forward to daylight saving time, and a time overlap when moving the clock back to standard time and the last hour before the transition is repeated. ZoneRules, part of the package, to determine how an offset varies for a particular time zone. Also, XML and other network formats define date-time transfer as OffsetDateTime or OffsetTime.Īlthough all three classes maintain an offset from Greenwich/UTC time, only ZonedDateTime uses the
When would you use OffsetDateTime instead of ZonedDateTime? If you are writing complex software that models its own rules for date and time calculations based on geographic locations, or if you are storing time-stamps in a database that track only absolute offsets from Greenwich/UTC time, then you might want to use OffsetDateTime. OffsetTime handles time with a corresponding time zone offset from Greenwich/UTC, without a time zone ID.OffsetDateTime handles a date and time with a corresponding time zone offset from Greenwich/UTC, without a time zone ID.ZonedDateTime handles a date and time with a corresponding time zone with a time zone offset from Greenwich/UTC.The Date-Time API provides three temporal-based classes that work with time zones: The TimeZoneId example also prints a list of all time zone IDs to a file called
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