Asalha Puja Day
There are two Buddhist holy days in July. Asaha Puja Day or Sangha Day and the beginning of Buddhist Lent, Wan Khao Punsa.
They are official holidays in Thailand and many people go to temples for special ceremonies.'Asaha' means the eighth lunar month and Asaha Puja means the ceremony in the eighth lunar month.
Buddhist Lent Day
Vassa is the three-month annual retreat observed by Theravada practitioners. Taking place during the wet season, Vassa lasts for three lunar months, usually from July (the Burmese month of Waso) to October (the Burmese month of Thadingyut)
In English, Vassa is often glossed as Rains Retreat or Buddhist Lent, the latter by analogy to the Christian Lent (which Vassa predates by at least five centuries).