What is Javanese calendar?
The '''Javanese calendar''' is the [[calendar]] used by the [[Javanese people]]. It is used together with two other calendars, the [[Gregorian calendar]] and the [[Islamic calendar]]. The Gregorian calendar is the official calendar of the [[Republic of Indonesia]] and civil society, while the Islamic calendar is used by Muslims and the Indonesian government for religious worship and deciding connected [[Islamic holidays]]. The Javanese calendar is used by the main ethnicities of [[Java island]]—that is, the [[Javanese people|Javanese]], [[Madurese people|Madurese]], and [[Sundanese people]]—mainly as a [[cultural icon]] and identifier, and as a maintained tradition of antiquity. The Javanese calendar is used for cultural and spiritual purposes.<ref>{{Cite web|last=Arciniega|first=Matthew|title=More about Javanese Wetonan|url=http://xentana.com/java/weton/basis.htm|archive-url=https://web.archive.org/web/20060830215424/http://www.xentana.com/java/weton/basis.htm|archive-date=2006-08-30}}</ref> The [[Epoch (reference date)|epoch]] of the Javanese Calendar was in the year [[AD 125|125 CE]] (AD 125). The current system of the Javanese calendar was started by [[Sultan Agung of Mataram]] in the Gregorian year 1633 CE.<ref>{{Cite book|url=https://books.google.com/books?id=YA3TNeNUfkAC&pg=PA70|title=Java|last=Oey|first=Eric|publisher=Tuttle Publishing|isbn=978-962-593244-6|pages=70}}</ref> Before this, the Javanese had used the [[Balinese saka calendar|Śaka calendar]], which has its epoch in 78 CE and uses the [[Lunisolar calendar|lunisolar cycle]] for calculating time.<ref>{{Cite book | last = Ricklefs | first = M.C. | title = A History of Modern Indonesia Since c. 1300 | publisher = Stanford University Press | year = 1993 | pages = 46 | isbn = 0-8047-2195-5 }}</ref> Sultan Agung's calendar kept the Saka calendar year system of counting, but differs by using the same [[lunar year]] measurement system as the [[Islamic calendar]], rather than the [[solar year]]. Occasionally, the Javanese calendar is