Dhammakaya Temple and Foundation helped monks from 33 temples in Narathiwat province

Dhammakaya Temple and Foundation gave rice and dried food to help monks from 33 temples in Narathiwat province.

What is the historical background of the Buddhist Lent season or rainy retreat and the activities of monks during these months?

This period of the year is known as the Buddhist Lent season or rainy retreat. I would like to know the historical background of this religious event and the activities of monks during these months.