SelapanJavanese calendar · weton

The Javanese calendar, with the arithmetic shown.

Give it a date — a birthday, today, any date at all — and see its weton, Javanese date, wuku, and mangsa, along with the arithmetic that produced them.

Computed in your browser, from the date on this device.

Also here

Calendar A whole month with pasaran, Javanese date, wuku and mangsa — or a whole year of mangsa at once.
Counting Selapanan for a newborn and slametan dates, counted from one date.
Learn How the cycles work, the Aboge and Asapon kurup, and every source.