When is Krushnastami celebrated and why?

PaancharaatraAagama scriptures say the following as Janmaslokam of Sri Krushna: సింహరాసే అతసీపక్షే రొహిణ్యాం అష్టమీతిథౌ | చరమార్థ ప్రదాతారం కృష్ణం వందేజగద్గురుం || After the Sun enters into simharasi, during the Krushnapaksham, choose the day of Ashtami which meets the star of Rohini. By