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Javanese calendar

Calendar used in Java, Indonesia

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The Javanese calendar is used by the main ethnicities of Java island—that is, the Javanese, Madurese, and Sundanese people—primarily as a cultural icon and identifier, and as a maintained tradition of antiquity. The Javanese calendar is used for cultural and spiritual purposes.

The current system of the Javanese calendar was inaugurated by Sultan Agung of Mataram in the Gregorian year 1633 CE. Prior to this, the Javanese had used the Śaka calendar, which has its epoch in 78 CE and uses the lunisolar cycle for calculating time. Sultan Agung's calendar retained 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 referred to by its Latin name Anno Javanico or AJ (Javanese Year).

Calendar cycles

The Javanese calendar contains multiple, overlapping (but separate) measurements of times, called "cycles". These include:

  • the native five-day week, called Pasaran
  • the common Gregorian and Islamic seven-day week
  • the Solar month, called Mangsa
  • the Lunar month, called Wulan
  • the lunar year, or Tahun
  • the octennial (8 year) cycles, or Windu
  • the 120-year cycle of 15 Windu, called Kurup

Current correlations

The Javanese calendar year of 1941 occurred entirely within the civil calendar year of 2008. Such years occur once every 33 or 34 Javanese years (32 or 33 civil years). More are listed here:

A Javanese year will be entirely within a Gregorian year of the same number in the year 4195, after which year the number of the Javanese year will always be greater than the number of the concurrent civil year.

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