Observed on Paurṇamāsī tithi of Āśvayuja (lunar) month. Have to play Aksha kreeda only on this day and Ko-jagarti-Vratam (Lakshmi will ask “who are awake”). Vaalakhilya Rushi mentioned Ko-jagarti Vratam
निशीथे वरदा लक्ष्मीः को जागर्तीति भाषिणी। तस्मै वित्तं प्रयच्छामि अक्षैः क्रीडां करोति यः॥