java.time.temporal: lower level access to the fields.
java.time.format: customization options.
The offset-based date-time types OffsetTime and OffsetDateTime, are intended primarily for use with network protocols and database access. For example, most databases cannot automatically store a time-zone like ‘Europe/Paris’, but they can store an offset like ‘+02:00’.
An Instant represents a specific moment in time using GMT.
Daylight Saving Time
The United States observes daylight savings time on March 12, 2017, by moving the clocks forward an hour at 2 a.m.
In the United States, daylight savings time ends on November 5th, 2017 at 02:00 a.m. and we repeat the previous hour.
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