Today, 22 September 2013 is Sankashti Chaturthi (Monthly Ganesha Chaturthi Fasting). It is observed on Krishna Paksha Chaturthi in each Hindu month. This previous Sankashti was also known as Maha Sankashti Chaturthi. The previous Chaturthi was Ganesh Chaturthi (Vinayaka Chavithi).
Sankashti of September 2013 falls in Krishna Paksha of Ashwin Month as per North Indian Hindi calendars and in Bhadrapada Month according to Marathi, Gujarati, Telugu and Kannada calendars.
It falls in Purattasi Masam of Tamil Panjangam, Kanni Masam of Malayalam Panjangam and Ashin Month of Bengali Panjika.
The Moonrise time or chandrodayam is at 8.15 PM IST. For more information on city-wise Moonrise Time on 22 September 2013 — Read this article
The next Sankashti Chaturthi will be in October 2013 – Ashwin Month in Amavasyant calendars, Kartik Month in Purnimant calendars, Aippasi Masam in Tamil calendar, Tulam Masam in Malayalam calendar and Kartik Month in Bengali calendar.