Happy Angarki Sankashti Chaturthi 2021! During Phalgun month we celebrate Chaturthi of Krishna Paksha. Sankashti Sri Ganesh Chaturthi is observed on the Chaturthi of Krishna Paksha every month. Along with Sankashti Chaturthi, it is also Tuesday and whenever Tuesday falls on Chaturthi Tithi, it becomes Angarki Chaturthi.