25 July 2016 is First Shravan Somvar in North Indian Hindi calendars. In Marathi, Gujarati, Telugu and Kannada calendars, it is on 8 August. And in Nepali calendar, first Shravan Somvar Vrat date is July 18.
25 July falls on Krishna Paksha Shashti in Shravan Month as per North Indian Hindi calendars; in Ashada Month as per Purnimant Panchangams. August 8 falls on Shukla Paksha Shashti in Shravan Month as per all Hindu calendars.
In North Indian calendars, Shravan Month begins on July 20 and ends on and ends on August 18.
As per Telugu, Kannada, Marathi & Gujarati calendars, Shravan Maas 2016 begins on 3 August and ends on 1 September.