Pawukon calendar
The complexity of the calendar is increased by the calculations required to determine the arrangement of the days of the 1-, 2-, and 10-day weeks, which are not ordered in simple recurring 1, 2 and 10-day cycles.Pawukon cycles are unnumbered, so the calendar has no epoch, and the choice of date on which to base a correspondence is arbitrary.Dershowitz and Reingold[1] chose the first Pawukon that began on a positive Julian Day Number, which was specifically JDN 146 (May 26, 4713 BCE in the proleptic Julian calendar; April 18 of that year in the proleptic Gregorian).Consulting the table below, we find that it is Menga, Beteng, Jaya, Umanis, Was, Anggara, Kala, Jangur, Dewa.The Saptawara maps to the Gregorian weekday cycle one-to-one, with Redite as Sunday, which provides a simple double-check mechanism: since we have Anggara on Tuesday, we have not made an obvious error in the counting.