Our API directory now includes 54 calendar APIs. The newest is the InfoPark Web Calendar API. The most popular, in terms of mashups, is the Eventful API. We list 47 Eventful mashups. Below you'll find some more stats from the directory, including the entire list of calendar APIs.
Looking for a reason to celebrate? Well, the average person may not be aware of it, but apparently there is a whole list of trivial (and some significant) reasons why anyone could justify celebrating any given day. Anniversarator is a fun, online calculator that provides users with information on special occasions related to the date the put into the search box. The Anniversarator API makes this data available to be integrated with third party applications.