DateTime::Set is a module for datetime sets. It can be used to handle two different types of sets: * Fixed sets of predefined datetime objects. For example, if we wanted to create a set of datetimes containing the birthdays of people in our family. * Recurring sets, 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.
WWW: http://search.cpan.org/dist/DateTime-Set/
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