String toIso8601String()

Returns an ISO-8601 full-precision extended format representation.

The format is yyyy-MM-ddTHH:mm:ss.sssZ for UTC time, and yyyy-MM-ddTHH:mm:ss.sss (no trailing "Z") for local/non-UTC time, where:

  • yyyy is a, possibly negative, four digit representation of the year, if the year is in the range -9999 to 9999, otherwise it is a signed six digit representation of the year.

  • MM is the month in the range 01 to 12,
  • dd is the day of the month in the range 01 to 31,
  • HH are hours in the range 00 to 23,
  • mm are minutes in the range 00 to 59,
  • ss are seconds in the range 00 to 59 (no leap seconds), and
  • sss are milliseconds in the range 000 to 999.

The resulting string can be parsed back using parse.