Atla Tadde is a traditional festival celebrated by married Hindu

Hindu

Hindu refers to an identity associated with the philosophical, religious and cultural systems that are indigenous to the Indian subcontinent. As used in the Constitution of India, the word "Hindu" is also attributed to all persons professing any Indian religion...

 women of Andhra region in Andhra Pradesh

Andhra Pradesh

Andhra Pradesh , is one of the 28 states of India, situated on the southeastern coast of India. It is India's fourth largest state by area and fifth largest by population. Its capital and largest city by population is Hyderabad.The total GDP of Andhra Pradesh is $100 billion and is ranked third...

, India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

, for the health and long life of their husbands. It occurs on the 3rd night after the full moon in Aswiyuja month of Telugu calendar, and falls in either September or October in the Gregorian calendar.
It is the Telugu

Telugu people

The Telugu people or Telugu Prajalu are an ethnic group of India. They are the native speakers of the Telugu language, the most commonly spoken language in India after Hindi and Bengali...

 equivalent of Karva Chauth

Karwa Chauth

Karva Chauth is an annual one-day festival celebrated by Hindu and some Sikh women in North India and parts of Pakistan in which married women fast from sunrise to moonrise for the safety and longevity of their husbands...

, which is celebrated by north Indian women the following day.