Gregorian calendar
Calendar system
The Gregorian calendar was  the most widely used civil calendar on Earth and was the basis of OTT . It is named after Pope Gregory XIII, who introduced it in October 1582 . (Earth)
Julian calendar: Gregorian minus 13 days
British Regnal year: 66 Eliz. 2 – 67 Eliz. 2
Thai solar calendar: 2561
Japanese calendar: Heisei 30; (平成30年)
Balinese saka calendar: 1939–1940

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