Aadi (month)

Aadi is the fourth month of the Tamil calendar. The name of the month is derived from the position of the Moon near the Pooradam or Uthiradam nakshatra on the pournami day. The month corresponds to the end of the muthu-venil season and falls in July-August in the Gregorian calendar.
In the Hindu lunar calendar, it corresponds to the fourth month of Ashadha, falling in the Gregorian months of June-July. In the Hindu solar calendar, it corresponds to the fourth month of Karkata and begins with the Sun's entry into Cancer. In the Vaishnav calendar, it corresponds to the fourth month of Vamana.

Festivals

The month is dedicated to Mariamman amongst the Tamils, and Aadi Amavasai, celebrated on Amavasya of the month is an important festival. Aadi Perukku is celebrated on the 18th day of the month. The festival pays tribute to water's life-sustaining properties, and prayers to Hindu gods.
Guru Purnima, a festival dedicated to honoring the gurus, is celebrated on the Purnima day of the month.