Deep Puja, also known as Deepa Pooja, is observed on the Amavasi (No moon) day in Ashada month in
Maharashtra and in some parts of Andhra Pradesh and Karnataka. It is observed to welcome the holy Shravan month by some Hindu communities. In 2017, the date of Deep puja in Maharashtra is July 23. All the diyas or lamps in house are cleaned on the day.
For observing Deepa puja, people clean their homes and decorate houses with colorful Rangoli patterns. Some people make sure that all the lamps in the home are thoroughly cleaned. The important lamps used for pujas are arranged in the Puja room and special pujas are offered. Devout Hindus believe that the worship of Diya will usher in knowledge and will help in seeking the blessings of Ashta Lakshmis.
In different regions, Deepa Puja is offered for different reasons. Some people offer it to welcome the Shravan month which is a holy month and numerous rituals and vratas are offered during the month. Ashada Amavas is the last in Ashada Month and next is the Sawan or Shrawan month. Some communities offer it to the various female deities in Hinduism. In some regions, people arrange diyas outside their house on Deep Puja day.
Another unique observance on Ashada Amavasi in
Maharashtra is the Gatari Amavasya. Ashada Amavasi is also chosen for performing rites dedicated to dead ancestors and relatives like Tarpan and Shradh in Andhra Pradesh and Karnataka.