› a table showing all the days, weeks, and months of the year: a desk/wall calendar The date Dec. 31 is circled in red on the calendar
› US (UK diary) a book, with pages for each day, in which you write down what you have to do: I've noted the date in my calendar.
› IT a computer program showing planned activities with their dates and times: I can access the calendars of everybody in the department. There's nothing in his calendar for today. To submit events directly to the online calendar, please enter a user name and email address on the form below.
› a list of events and dates within a year that are important to an organization or to the people involved in a particular activity: the academic/court/election, etc. calendar With just weeks left in the legislative calendar, there has been no vote yet on this most important issue.