Shravana Masa is regarded as a sacred month to seek blessing of Lord Shiva and Goddess Gauri by observing Vrats. Shravana Somvar Vrat and Mangala Gauri Vrat are observed in Shravana month. Devotees take Sankalp either to observe fast in Shravana month or to initiate sixteen weeks Vrat starting from Shravana month.
Mangala Gauri Vrat is usually observed by married women on each Tuesday in Shravana month. Newly wed women, observe this vrat to get marital bliss. In North India, Shravana month is also called as Sawan month.
In Andhra Pradesh, Mangala Gauri Vrat is also known as Sri Mangala Gowri Vratham.
There is a difference of fifteen days in the starting time of Shravan month depending on the lunar calendar followed in the region. In the Purnimant calendar followed by North Indians, Shravan month begins fifteen days before the Amavasyant calendar.
Lunar Calendar is followed in Andhra Pradesh, Karnataka, Tamil Nadu, Goa, Maharashtra and Gujarat, Amavasyant. Purnimant Calendar is followed in Punjab, Rajasthan, Madhya Pradesh, Uttar Pradesh, Himachal Pradesh and Bihar. Hence half of the Sawan Somwar dates differ in both calendars.