Aani Masam is the third month in a traditional Tamil calendar. In 2016, Aani Month begins on June 15, 2017 and ends on July 15. The most important and auspicious day in the month is the Aani Uthiram (June 30, 2017).
Ekadasi dates in Aani Masam are on June 20 and July 4
Shiva Pradosham dates are on June 21 and July 6.
Sashti Muruga Fasting is on June 29.
Aani Pournami or full moon day is on July 9
Aani Ammavasi is on June 24.
Pillayar Sankatahara Chaturthi is on July 12. (Ganesh Sankashti Chaturthi)
The next month in Tamil Calendar is the Aadi Month.