Tibetan calendar

This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) This article includes a list of general references, but it lacks sufficient corresponding inline citations. Please help to improve this article by introducing more precise citations. (December 2011) (Learn how and when to remove this template message) This article is missing information about methods to determine new year. Please expand the article to include this information. Further details may exist on the talk page. (February 2021) (Learn how and when to remove this template message)

The Tibetan calendar (Tibetan: ལོ་ཐོ, Wylie: lo-tho), or Tibetan lunar calendar, is a lunisolar calendar, that is, the Tibetan year is composed of either 12 or 13 lunar months, each beginning and ending with a new moon. A thirteenth month is added every two or three years, so that an average Tibetan year is equal to the solar year.

The Tibetan New Year celebration is Losar (Tibetan: ལོ་གསར་, Wylie: lo-gsar). According to almanacs the year starts with the third Hor month. There were many different traditions in Tibet to fix the beginning of the year.^[which?] The dates of Mongolian calendar are the same as the Tibetan calendar.

Every month, certain dates in the Tibetan calendar have special significance for Buddhist practices. Likewise, certain months also have significance.