10 July 2017 is First Shravan Somvar in North Indian Hindi calendars. In Marathi, Gujarati, Telugu and Kannada calendars, it is on 24 July. And in Nepali calendar, first Shravan Somvar Vrat date is July 17.
10 July falls on Krishna Paksha Pratipada in Shravan Month as per North Indian Hindi calendars; in Ashada Month as per Purnimant Panchangams. July 24 falls on Shukla Paksha Pratipada in Shravan Month as per all Hindu calendars.
In North Indian calendars, Shravan Month begins on July 10 and ends on and ends on August 7.
As per Telugu, Kannada, Marathi & Gujarati calendars, Shravan Maas 2017 begins on 24 July and ends on 21 August.