The "kurup" is a period of 120 "tahun", or lunar years. There are thus 1440 lunar months, or 15 "windu" in a "kurup". One day is dropped from the last month of Besar having 30 days, resulting in the last "windu" of the "kurup" having one less day than usual. Thus, the total number of days in a "kurup" is 42,524 (2,835 days in a "windu" x 15 "windu" - 1 day). This is the same number of days as in 120 lunar years of the Tabular Islamic Calendar.