Round

The rounding behavior for halfway values is to round up.

The Round method operates on TIME as an absolute duration since the zero time; it does not operate on the presentation form of the time. If DURATION is a multiple of one hour, Round may return a time with a non-zero minute, depending on the time zone.

{{ $t := time.AsTime "2023-01-27T23:44:58-08:00" }}
{{ $d := time.ParseDuration "1h" }}

{{ ($t.Round $d).Format "2006-01-02T15:04:05-00:00" }} → 2023-01-28T00:00:00-00:00