Use the sometimes tool
Turn vague time and frequency language into dates, intervals and repeatable schedules.
What sometimes.you is for
The name emphasizes the reader's result: make the reference date and location explicit.
Keep the date and time zone visible
A clock reading or duration can cross midnight. Include the calendar date, UTC offset and named time zone whenever a result will be shared.
Check the result before sharing
Confirm the calendar date, local clock time, UTC offset and named time zone so another person can reproduce the same result.