27 August 2013 is Shitala Satam in Gujarat. Shitala Satam is observed a day prior to Sri Krishna Janmashtami. It falls in Ashtami of Vad Paksh in Shravan Month according to Gujarati calendar.
This vrata is dedicated to Goddess Shitala Mata. Shitala mata puja is the main ritual of the day. Devotees eat cold meal (the food cooked on Randhan Chhath day) during the day.
Shodashopachar puja is offered by installing the idol of Shitala mata. Details about appearance and iconography of Shitala mata is given in Skanda purana.
Shitala Satam Vrat Katha (Story of Sheetala Saptami) is mentioned in the Bhavishyottara Purana. The story is associated with the King named Indralumna who used to rule the Hastinapur kingdom.