Calendar can mean:
- A system for reckoning days, months, and years for the benefit of scheduling or recording the activities of an individual, group, or government, or the history of the world, any nation-state within it, any city or province within a nation-state, etc.
- The schedule of debate of bills, resolutions, motions, and other such matters by a legislature.
This page lists articles that have similar names. To remove any ambiguity, the differences are described here.