Avani Masam is the fifth month in a year in a traditional Tamil calendar. In 2023, Avani Masam begins on August 18 and ends on September 17. The most important festival in the month is Sri Krishna Jayanti on September 6. Avani Moolam is on August 26.
Ekadasi dates in Avani Masam are on August 27 and September 10
Shiva Pradosham dates are on August 28 and September 12
Pillayar Sankatahara Chaturthi is on September 3 (Ganesh Sankashti Chaturthi)
Aavani Amavasya is on September 14
Muruga Sashti Fasting is on September 14
Aavani Pournami or full moon day is on August 30 (Avani Avittam - Upakarma)