For all input and most of the output time values are Unix timestamps. For some of the output time values ISO 8601 standard is used.
Input time values must be formatted as a Unix timestamp in nanoseconds:
Output time values are formatted using the following pattern:
ISO 8601 standard format specifier
The year as a four-digit number.
The month, from 01 through 12.
The day of the month, from 01 through 31.
The hour, using a 24-hour clock from 00 to 23.
The minute, from 00 through 59.
The second, from 00 through 59.
The ten millionths of a second in a date and time value.