correct region, but also for variations within regions itself when incursions cause a variation in practice. (Note: The Sukhothai and Lan Xang numbering systems and the now abandoned Burmese numbering system are the same.) Likewise, Cambodian and Thai systems have retained the practice of giving animal names to the years from a cycle of 12. The practice also existed in Burma in the Pagan period but later died out. Moreover, Chulasakarat uses three similar but not identical types of lunar years used by the Burmese calendar. Each calendar has the same regular year of 354 days and a leap year of 384 days. However, whereas the Burmese calendar adds the intercalary day only in a leap cycle according to its Metonic cycle, the Siamese calendar adds the intercalary day to a regular year. The Siamese calendar does add the extra day in the same place (Jyestha/Nayon), however. Lastly, the calculation methods also diverged in the mid-19th century when the Konbaung dynasty switched to the Thandeikta method, which is 0.56 second per year longer than the old system. Dai The traditional Dai calendar of Dai people of the Xishuangbanna in China is largely based on the Burmese calendar although it may have some Chinese influences. Current usage Public holidays The Burmese calendar is still used to determine a number of public holidays in Myanmar. Date of birth In Myanmar, people may register their date of birth in a Gregorian or Burmese calendar format. Official formats The Burmese language versions of official pronouncements by the government such as laws, notifications, documents are dated in both Burmese and Western (Gregorian) forms. The Burmese calendar date comes first, and is followed by the equivalent Gregorian calendar date in parentheses, both in the Year-Month-Day order. For example, the date of 29 March 2017 is written as: () See also Chula Sakarat Buddhist calendar Burmese zodiac Notes References Bibliography External links 1500 Years of Myanmar Calendar by Cool Emerald Myanmar Calendar by Burmese Classics Era Calendar Converter with Burmese calendar Specific calendars Calendar