Makha Puja Day takes place on the full moon day of the third lunar month. This Holy Day is observed to commemorate two important events in the life of Lord Budda. After the first Rains Retreat at Deer Park, Lord Buddha went to Rahagaha City. There were 1,250 Arahantas (enlightened followers) returned from their mission without prior appointment to pay respect to the Lord Buddha. This assembly is called the Fourfold Assembly as a result from 4 special factors:

1. All 1250 monks were Arahants.
2. All of them had been ordained by the Lord.
3. They assembled by themselves without prior call.
4. It was the full moon day of Makha month.