Sankatahara Chaturthi in August 2018 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 2018 date is August 30, Thursday.
It falls on Bhadrapada Krishna Chaturthi in North Indian Hindi calendars whereas in Shravan Masa Krishna Paksha in Marathi, Gujarati, Kannada, and Telugu Panchangam. Chandrodayam Time (Moonrise Timings) on 30 August is – 9.30 PM.
This Sankashti Chaturthi is also celebrated as Bahula Chaturthi (Bol Choth) in Gujarat and some parts of Maharashtra.
This Sankashti Chaturthi falls in Chinga Masam of Malayalam calendar, Aavani Masam of Tamil Panchangam and Bhadra Month in Bengali Panjika.
Sankashti August 2018 Moonrise timings for all cities in India is given here.