Māgha Pūjā (also written as Makha Bucha Day) is the second most important Buddhist festival after Vesak.

Magha Puja Day is also known as Sangha Day or Fourfold Assembly Day in most Buddhist countries, and is observed on the first full moon day of the month of Magh, which tends to fall in the Gregorian months of January or February. The day commemorates a time when 1,250 Buddhists spontaneously came together to pay their respect to the Buddha. The festival is in honor of the Sangha, or the Buddhist community and is a chance for people to reaffirm their commitment to Buddhism.