BONSERNEWS.com – The Javanese calendar has a calendar system used by the Mataram Sultanate and various kingdoms and regions that were influenced by it.
The Javanese calendar calendar also combines the Hijri (Islamic) calendar system, the Christian calendar, and the Saka (Hindu) calendar.
First published by the King of Mataram Sultan Agung Hanyokrokusumo in 1940.
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One Suro night in the Javanese calendar to introduce the Islamic calendar among the Javanese people.
In 931 H or 1443 during the reign of the Demak kingdom or the new Javanese year.
Sunan Giri II made adjustments between the Hijri calendar system and the Javanese calendar system at that time.
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However, the tradition of one Suro night began during the time of Sultan Agung, where people followed the Saka year calendar system inherited from Hindu tradition.
Meanwhile, the Islamic Mataram Sultanate already uses the Hijri (Islamic) calendar system.
Starting from the desire to expand Islamic teachings in the Land of Java, Sultan Agung took the initiative to combine the Saka calendar with the Hijri calendar to become the Javanese calendar.
One Suro night begins on Legi Friday, Jumadil month at the end of 1555 Saka or July 8, 1633 AD.
Apart from that, Sultan Agung also wanted to unite the island of Java and he did not want his people to be divided because of differences in religious beliefs.
Sultan Agung also wanted to unite the santri and abangan groups.