Sankatahara Chaturthi in August 2012 is known as Maha Sankashti or Maha Sankata Nivarana Chaturthi. Sankata Chavithi that falls before a fortnight (15 days) of Ganesh Chaturthi is very auspicious to worship Lord Ganesha. Maha Sankashti 2012 date is August 5. It falls on Bhadrapad Krishna Chaturthi in North Indian Hindi calendars whereas in Shravana masa Krishna Paksha in Marathi, Gujarati, Kannada, and Telugu Panchangam. The actual Maha Sankashti falls in September 2012 (September 4 as Angaraki Sankashti Chaturthi).
In August 2012, Sankata Chavithi starts on 5th August just after Sunrise (5:55 am) and ends on 6 August at 6.13 am. It is very auspicious that Chaturthi starts at the Sunrise and ends after Sunrise on the next day. After 15 days of this Sankashti, Ganesh Chaturthi or Vinayaka Chavithi is celebrated.
Sankashti August 2012 Moonrise timings for all cities in India is given here.
Read the Sankashti Chaturthi Vrat katha or the story of Sankashtahara Chaturthi here. The importance of Sankashti Vrata is given here.

Arjun
Aug 17. 2011
Thanks for the information. But it will really nice if you can post the chandrodaya timing.
Arjun
Aug 17. 2011
Thanks for the information. But it will really nice if you can post the chandrodaya timing. Please Post them as you do every month.
naveen.sanagala
Aug 17. 2011
Moonrise or Chandrodaya timings are given in this article…
http://hindupad.com/sankashti-chaturthi/17-august-2011-sankashti-chaturthi-moonrise-time-today-chandrodayam-time/
seema
Jul 07. 2012
Hi
I am so happy that i get all the informations regarding hindu religion. I have a doubt. I heard that in North India when people are in critical situation, they keep ganapathy in water. The statue will be completely in water till their wish get done. Is it a correct process. Please advise. Awaiting for a reply.
Thanks
Seema
Sadhna
Mar 30. 2013
significance of maha sankat chaturthi
Snigda
Mar 30. 2013
when will be maha sankatahara chaturthi
Indrasena
May 26. 2013
which date ganesh chaturthi in month of may 2013 twice