FormatDateTime formats value as a date-time, (RFC3339 section 5.6) Example: 1985-04-12T23:20:50.52Z.

FormatEpochSeconds returns value as a Unix time in seconds with with decimal precision Example: 1515531081.123.

FormatHTTPDate formats value as a http-date, (RFC 7231#section-7.1.1.1 IMF-fixdate) Example: Tue, 29 Apr 2014 18:30:38 GMT.

ParseDateTime parses a string as a date-time, (RFC3339 section 5.6) Example: 1985-04-12T23:20:50.52Z.

ParseEpochSeconds returns value as a Unix time in seconds with with decimal precision Example: 1515531081.123.

ParseHTTPDate parses a string as a http-date, (RFC 7231#section-7.1.1.1 IMF-fixdate) Example: Tue, 29 Apr 2014 18:30:38 GMT.

SleepWithContext will wait for the timer duration to expire, or until the context is canceled.