Avani Masam is the fifth month in a year in a traditional Tamil calendar. In 2025, Avani Masam begins on August 17 and ends on September 16. The most important festival in the month is Sri Krishna Jayanti on September 14. Avani Moolam is on September 2.
Ekadasi dates in Avani Masam are on August 19 and September 3
Shiva Pradosham dates are on August 20 and September 5
Pillayar Sankatahara Chaturthi is on September 10 (Ganesh Sankashti Chaturthi)
Aavani Amavasya is on August 23
Muruga Sashti Fasting is on August 29
Aavani Pournami or full moon day is on September 8
Vinayagar Chaturthi is held in 2025 in Avani Masam and is on September 10.