Today is the rising date of Chaitra Krishna Paksha Tritiya and Monday. Tritiya date will remain till 8.20 am today. After that Chaturthi Tithi will start. Today the fast of Sankashti Shri Ganesh Chaturthi will be observed. You must know that - Lord Ganesha is worshiped on the Chaturthi of both Krishna and Shukla Paksha of every month.