Purnima and Amavasya have special significance in Hinduism. Amavasya falls on the last date of the Krishna Paksha of every month. This time Amavasya of Krishna Paksha is on 12 April. It is called Somvati Amavasya because it is Monday on this day. The special thing is that in the year 2021, there is only one Somavati Amavasya. Therefore, it is more important.