Prathamaikdas is one of the most important festivals observed in our country. The Ekdas which falls in the suklapaksha of the month of shha is called by this name. This festival is also called by names such as Ekdas, festival of fasting, mahaikdas, syan etc. This happens to be a very important parva observed by virtuous people of all the varas and sramas, and people belonging to all sects such as aiva, Vaishava etc.