Description:

Calendar provides an API for building calendar data structures. Using
the simple iterator and it's "query" API, a user interface can easily
be built on top of the calendar data structure, at the same time
easily connecting it to some kind of underlying data store, where
"event" information is being held.

It provides different calculation "engines" the default being based on
Unix timestamps (offering fastest performance) with an alternative
using PEAR::Date which extends the calendar past the limitations of
Unix timestamps. Other engines should be implementable for other types
of calendar (e.g. a Chinese Calendar based on lunar cycles).

In PEAR status of this package is: beta.