In lunar religious calendars, Jyeshtha begins on the new moon and is the third month of the year.
Traditionally, Jyeshtha is associated with high summer, and corresponds to May-June in the Gregorian calendar. In Tamil, the month is known as Aani, the third month of the solar calendar that begins in mid-June.
In solar religious calendars, Jyeshtha/Aani begins with the Sun's entry into Gemini, and is the third month of the year. In the Vaishnava calendar, Trivikrama governs this month.
Vat Pournima is a celebration observed in Maharashtra and Karnataka, India. It is celebrated on the full moon day (the 15th) of the month of Jyeshtha on the Hindu Calendar, which falls in June on the Gregorian Calendar. Women pray for their husbands by tying threads around a banyan tree on this day. It honors Savitri, the legendary wife of Satyavan who escaped death for her husband's life.
Snana Yatra is a bathing festival celebrated on the Purnima (full moon day) of the Hindu month of Jyeshtha. It is an important festival of the Jagannath Cult. The deities Jagannath, Balabhadra, Subhadra, Sudarshan, and Madanmohan are brought out from the Jagannath Temple (Puri) and taken in a procession to the Snana Bedi. They are ceremonially bathed and decorated for a public audience.
^Kenneth W. Morgan The Religion Of The Hindus - 1987 Page 96 "The year begins about the middle of March (Chaitra) in southern India and the middle of October (Karttika) in the north, but the names of the months are the same: Chaitra (March-April), Vaisakha (April-May), Jyeshtha (May- June), Ashadha ..."
^Henderson, Helene. (Ed.) (2005) Holidays, festivals, and celebrations of the world dictionary Third edition. Electronic edition. Detroit: Omnigraphics, p. xxix. ISBN 0-7808-0982-3