- 1 a page or series of pages showing the days, weeks, and months of a particular year, especially one that you hang on a wall a 2014 calendar see also Advent calendar
- 2 a record of what you have to do each day; the book or piece of software in which you write this down an appointment calendar compare appointment book, schedule
- 3 [usually singular] a list of important events or dates of a particular type during the year This is one of the biggest weeks in the baseball calendar. a major festival in the church's calendar This year's school calendar has become so crowded.
- 4a system by which time is divided into fixed periods, showing the beginning and end of a year the Islamic calendar