The current Javanese calendar was inaugurated by Sultan Agung of Mataram in the Gregorian year 1633 CE. It is based on a combination of the Hindu calendar "Saka" and the Islamic calendar based on the lunar month and year, and contains different cycles: Pasaran (5-day), Dinapitu (7-day), Wetonan (35-day), Wulan (lunar month), Pawukon (210-day), Taun (lunar year), Windu (8 lunar year), and Kurup (120 lunar year). Coincidences of these multiple cycles have special mystical meanings for any Javanese people, for instance the birthday "Weton" or the Noble Days "Dino Mulyo". This is the primary time-keeping system for all matters having cultural, historical, and metaphysical significance in the Java island, Indonesia.
The Javanese calendar has been created and starts on 8 July 1633 CE, which corresponds to "1 Sura 1555 AJ Alip Kuntara Jamingiyah", "AJ" means Anno Javanico. Presently, the calender is only defined until 25 August 2052 CE, the last day of the current Kurup. Any future date is speculative since the sequences of Wulan and Taun, proper to each Kurup, have not been defined yet by the Javanese Kings of Yogyakarta and Surakarta.
This script computes dates in the full Javanese calendar, indicating Dinapitu, Pasaran, Dino, Wulan, Tahun, Windu, and Kurup for today or a specific list of days. It indicates also the Noble Days if necessary. If you specify your date of birth, it can calculate your "weton" and a list of your Javanese birthdays.
>> weton(719135)
>> weton('3-Dec-1968')
>> weton(1968,12,3)all return the string "Slasa Kliwon Julungwangi 13 Pasa 1900 AJ Ehé Adi Langkir Salasiyah (Asapon), 3 Desember 1968 CE".
A second use of this function is to display a month calendar that combines the 5-day "Pasaran" cycle and the 7-day Gregorian/Islamic week, called "Wetonan".
>> weton(2020,10)returns the following table:
------------------------ WETONAN BULAN OKTOBER 2020 -------------------------
Awal: Kêmis Kliwon Langkir 13 Sapar 1954 AJ Jimakir Sêngara Langkir Salasiyah (Asapon), 1 Oktober 2020 CE
Akhir: Sêtu Kliwon Kuruwelut 14 Mulud 1954 AJ Jimakir Sêngara Langkir Salasiyah (Asapon), 31 Oktober 2020 CE
--------------------------------------------------------------------------------
Sênèn Slasa Rêbo Kêmis Jumungah Sêtu Ngahad
Pon 19 - 14 29 09 24 04
Wage 05 20 - 15 30 10 25
Kliwon 26 06 21 01 16 31 11
Lêgi 12 27 07 22 02 17 -
Paing - 13 28 08 23 03 18
A third use is a search mode, looking for regular expression in the full Javanese date string. For example, looking for the next new year "1 Sura":
>> weton(' 1 sura')
Slasa Pon Kulawu 1 Sura 1955 AJ Alip Sêngara Langkir Salasiyah (Asapon), 10 Agustus 2021 CE (SIJI SURA)which falls logically on the weton 'Slasa Pon' since we are in the Kurup 4 named 'Asapon'.
This is a little script written in Perl that computes only the "weton" for any dates in the Gregorian calendar. It uses the POSIX strftime function capabilities.
$ weton.pl -h
Usage: weton [options] [DATE]
Display the current 'Weton' day in the Javanese calendar, a combination of day
names in the Gregorian/Islamic 7-day week ('Dinapitu') and Javanese 5-day week
('Pasaran').
Options:
-n# display # next/previous Weton dates.
-h, --help display this help.
DATE display the Weton for a specific date, in the format YYYY-mm-dd
and/or with any complement time delay arguments:
[yesterday|tomorrow][N [next|last][day|week|year][ago]].
Examples:
weton 1968-12-03
weton -n10
weton tomorrow
weton 2 weeks ago
weton next year
Understand also Indonesian and Ngoko/Krama languages! Ayo coba!
A tiny utility written by Mas Francois.
v1.3 - April 2015 - please report bugs to <beauducel@ipgp.fr>.
This is a little script written in C that computes only the "weton" for a given date in the Gregorian calendar. It uses a specific formula adapted from Zeller's congruence.
$ weton
Usage: weton DAY MONTH YEAR.
$ weton 3 12 1968
~ Selasa Kliwon ~
François Beauducel, IPGP, beaudu, beauducel@ipgp.fr
The script weton.m and the congruence formula developed in weton.c have been presented in the following article:
Karjanto & Beauducel (2020), An ethnoarithmetic excursion into the Javanese calendar, https://arxiv.org/abs/2012.10064
See help for syntax, and script comments for details. See also 