1. Any of various systems of reckoning time in which the beginning, length, and divisions of a year are defined, sometimes along with multiyear cycles.
2. A table showing the months, weeks, and days in at least one specific year.
3. A schedule of events.
4. An ordered list of matters to be considered:the bills on a legislative calendar.
5. Chiefly British A catalog of a university.
tr.v. cal·en·dared, cal·en·dar·ing, cal·en·dars
To enter in a calendar; schedule.
[Middle English calender, from Old French calendier, from Late Latin kalendārium, from Latin, account book, from kalendae, calends (from the fact that monthly interest was due on the calends); see kelə-2 in the Appendix of Indo-European roots.]
THREE PRINCIPAL CALENDARS
The Gregorian calendar is now in use as the civil calendar throughout most of the world. The Jewish calendar is the official calendar of the Jewish religious community. The Islamic calendar is the official calendar in many Muslim countries. Each calendar listed below begins with the first month of the year and includes the number of days each month contains. Many months have a variable number of days, as described below.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.
American Heritage Dictionary Products
The American Heritage Dictionary, 5th Edition
The American Heritage Dictionary of Idioms
The American Heritage Roget's Thesaurus
Curious George's Dictionary
The American Heritage Children's Dictionary
The American Heritage Dictionary of Indo-European Roots
The American Heritage Student Grammar Dictionary
The American Heritage Desk Dictionary + Thesaurus
The American Heritage Science Dictionary
The American Heritage Dictionary of Business Terms
The American Heritage Student Dictionary
The American Heritage Essential Student Thesaurus