Date/Time with TimeZone

• Use UTC format for exchange of time-related data across time zones.

• Time zones in ISO 8601 are represented as local time (with the location unspecified), as UTC, or as an offset from UTC.

• Resources

  • Wikipedia - ISO 8601 (opens in a new tab)

Java

• JSR-310 Date and Time API

  

• Types

  • java.time.Instant

    Best way to represent a point in time in UTC

  • java.time.LocalDateTime

    Best way to represent a date and time without a time zone

  • java.time.ZonedDateTime

    Best way to represent a date and time with a time zone

UTC

• Wikipedia - Coordinated Universal Time (opens in a new tab)

• If the time is in UTC, add a Z directly after the time without a space. Z is the zone designator for the zero UTC offset.