You might consider something like Data::ICal or Data::ICal::DateTime These have the side benefit that the files can be read by other programs such as calendar programs and so forth.

UPdate: Just to make it clear the iCalendar specification already allows for recurrences and the other common things you might want from a calendar and these modules (and others) provide an interface to those files.

/J\

In reply to Re: storing and 'understanding' complex calendar events (including recurring events) by gellyfish
in thread storing and 'understanding' complex calendar events (including recurring events) by schweini

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