Jul 20, 2023

Datetime sets and set math

DateTimeSet is a module for date/time sets. It can be used to handle two different types of sets.

The first is a fixed set of predefined datetime objects. For example, if we wanted to create a set of dates containing the birthdays of people in our family.

The second type of set that it can handle is one based on the idea of a recurrence, such as “every Wednesday”, or “noon on the 15th day of every month”. This type of set can have fixed starting and ending datetimes, but neither is required. So our “every Wednesday set” could be “every Wednesday from the beginning of time until the end of time”, or “every Wednesday after 2003-03-05 until the end of time”, or “every Wednesday between 2003-03-05 and 2004-01-07”.

See also http//datetime.perl.org/

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