Known as Khao Phansa or 'Buddhist Lent', this day marks the beginning of the three-lunar-month period, during which all monks should stay in their temples and not travel.

During the lent period, elaborate wax candles are kept burning. In the city of Ubon, a Candle Festival is held. Following a parade of candles, the winners of best candle design are announced.

Khao Phansa or Buddhist Lent Day is a government holiday in Thailand, though banks are not closed.

The first of day of Buhhdist Lent used to be a public holiday but was replaced by Asahna Bucha in 2007. During Asahna Bucha and Khao Phansa, it is illegal to buy and sell alcohol.