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2.  The Indian national calendar, sometimes called the Saka calendar, is the
official civil calendar in use in India.
 It is used, alongside the Gregorian calendar, The Saka calendar is also used
in Java and Bali among Indonesian Hindus

3.  Japanese calendar types have included a range of official and unofficial
systems. At present, Japan uses the Gregorian calendar.

4.  The Buddhist is primarily used in mainland Southeast Asian countries of
Cambodia, Laos, Myanmar and Thailand as well as in Sri Lanka for
religious and/or official occasions.
 This calendars are largely based on an older version of the Hindu calendar.

5.  Hindu calendar is a collective name for most of the calendars used in India
since ancient times.
 Some of the more prominent regional Hindu calendars include the Nepali
calendar, Malayalam calendar, Tamil calendar etc

6.  The Islamic calendar, Muslim calendar or Hijri calendar (AH) is a lunar
calendar consisting of 12 months in a year of 354 days.
 I t is used to date events in many Muslim countries and used by Muslims
everywhere to determine the proper days on which to observe the annual
fasting, to attend Hajj, and to celebrate other Islamic holidays and festivals.

7.  Chinese calendar may refer to any of the official and civil calendars used in
China.
 In China, some holidays relate to the Chinese Calendar, such as Chinese
New Year

8.  The Iranian calendars are a succession of calendars used for over two
millennia in Iran .
 It has one of the longest chronological records in human history

9.  The Gregorian calendar, also called the Western calendar and the Christian
calendar, is internationally the most widely used civil calendar.
 It is named for Pope Gregory XIII, who introduced it in 1582.