DateTimeInterval is a subclass of ProperInterval, defined using the multi-element DateTimeDescription.

Date-time interval

DateTimeInterval is a subclass of ProperInterval, defined using the multi-element DateTimeDescription.

:DateTimeInterval can only be used for an interval whose limits coincide with a date-time element aligned to the calendar and timezone indicated. For example, while both have a duration of one day, the 24-hour interval beginning at midnight at the beginning of 8 May in Central Europe can be expressed as a :DateTimeInterval, but the 24-hour interval starting at 1:30pm cannot.