I want to define time intervals like:
- Each week, from Monday 12:00 a.m. to Sunday 11:59:59 p.m.
- Each day from 12:00 a.m. to 11:59:59 p.m.
- Each month from the first day of the month 12:00 a.m. to the last day of the month 11:59:59 p.m.
Is this possible using ISO 8601, or any other well-known standard?