# Why do we not consider Brahma's night as a kalpa?

Why do we consider only the day of Brahma as a kalpa?

1 kalpa = One day of Brahma

2 kalpa = One day + Night of Brahma

Accordingly, "2 kalpa = One day + Night of Brahma" we are in the 101st Kalpa of Brahma.

Could someone please tell me why we consider only the day kalpa of Brahma?

• Because Kalpa is not a unit of time, it's a specific period. A day of Brahma is called a Kalpa, and a night of Brahma is called a Pralaya. They're the same length if time, but creation goes on in one of them and destruction goes on in the other. Aug 4, 2015 at 4:58
• ok means we can not consider pralaya in our calendar..., but when we want to calculate how many years ago loard rama was born in this calculation we consider pralaya or not ? Aug 4, 2015 at 5:13
• Well, Rama lived in the present Vaivasvata Manvantara, as I discuss in my answer here: hinduism.stackexchange.com/a/7189/36 So there's no Pralaya in between. But yeah, if we want to calculate the time between some event in some previous Kalpa and some event in the present Kalpa, we would need to add the lengths of the Pralayas in between. Aug 4, 2015 at 5:18