The Calendar API defines the high-level interfaces required to obtain read access to a user's calendaring service.

Work on this document has been discontinued and it should not be referenced or used as a basis for implementation.

The Calendar API was intended to enable API access to a user's calendar information. The Device APIs Working Group worked on both the calendar data format and calendar interfaces but then decided to change the approach to enable general Web use both to address security concerns and to enable wider use in a web context. The plan was to learn from developing the Contacts API and apply this work to the Calendar API. The Contacts API was revised to use Web Intents and then discontinued when Web Intents work was stopped. Subsequently work on the Calendar API was also discontinued following a Working Group decision.

The Charter of the Device APIs Working Group continues to include this work as "in scope", so the working group could decide to resume work if warranted by new information.