Mantra of Lord Ganesha. Sankastahara Chaturthi falls on the fourth day of the second fortnight of every month on the Hindu Calendar. Devotees fast for a whole day and break their fast after having the darshan of Lord Moon and worshiping Lord Ganesh with this mantra. This vow is observed to get rid of problems in life. So Ganesha is also called as the "Vigneshwara" the one who gets rid of all vignas or problems.