Lent (Vassa) .   Vassa (from Pāli vasso , Sanskrit varṣaḥ , both "rain" - Burmese : ဝါဆို waso , Khmer : វស្សា or ព្រះវស្សា; Lao :, sometimes wāt săː ; Thai : พรรษา , pansa or phansaa ; ), also called Rains Retreat , is the traditional retreat during the