By observation
Bau Nyale
February, the 20th day of the tenth Sasak month
Fixed from lunar observation and confirmed by the appearance of the nyale; the official announcement issues some weeks beforehand.
People Nusa Tenggara Barat
Maintained Contested
A Sasak-speaking people of Lombok, largely Muslim, with communities at Bayan practising Wetu Telu, a form of Islam interwoven with local custom.
Wetu Telu — the three times — is distinguished from Waktu Lima, the five-times Islam of the mainstream. The name is often explained as the number of obligations observed; that explanation is itself disputed, and some adherents describe telu as a cosmological framework rather than a count of prayers.
Sources 1
By observation
February, the 20th day of the tenth Sasak month
Fixed from lunar observation and confirmed by the appearance of the nyale; the official announcement issues some weeks beforehand.