Tibetan people have their own calendar, what is it called?

Tibetan calendar: the traditional calendar of the Tibetan people in China, is also the lunar calendar is basically the same as the summer calendar. It is basically the same as the Summer Calendar. It takes the moon's cycle as one month, and the big and small months are interspersed with each other, with the big month falling on the 30th and the small month falling on the 29th. The year is 12 months, 354 days; leap year 13 months (on average, every two and a half to three years plus a leap month), 384 days, used to adjust the relationship between months and seasons. The Tibetan calendar attaches importance to "fixed hope", but not to "fixed solstice", that is, "hope" must be in the fifteenth day of each month, "solstice" is not necessarily in the first day of each month, so that the Tibetan calendar is not a good one, so that the Tibetan calendar is not a good one. The first day of the month, so that the Tibetan calendar and the summer calendar day order sometimes differ by one day. The Tibetan calendar also adopts the twenty-four solar terms, and makes forecasts for the operation of the five planets and solar and lunar eclipses. Tibetans set the first day of the first month of the Tibetan calendar as the New Year, equivalent to the Chinese Spring Festival, is the biggest festival of the year.