Ancient method of time reckoning

1 Asu (or Prana)	=	4 (sidereal) seconds
6 Asus	=	1 sidereal Pala (or Vighati or Vinadi or 24 seconds)
60 Palas	=	1 Ghati (24 minutes)
60 Ghatis	=	1 day (24 hours)
30 days	=	1 month
12 months	=	1 year
43, 20, 000 years	=	1 Yuga
72 Yugas	=	1 Manu
14 Manus	=	1 Kalpa (or 1008 Yugas)
2 Kalpas	=	A day and night of brahma
30 day-nights of Brahma	=	1 month of Brahma
12 months of Brahma	=	1 year of Brahma
100 years of Brahma	=	Life of Brahm (or 1 Mahakalpa
In addition to the above, the following methods of reckoning of time were used for astrological purposes :
1. Sidereal day	=	Time interval between one star-rise to the next
2. Civil day	=	Time interval between obe sunrise to the next
3. Lunar month	=	One new moon to the next
4. Solar maonth	=	Interval between entry of Sun from one sign to the other.
5. Solar year	=	Period of one solar revolution
6. Jupiterian (Barhaspatya) year	=	Period of Jupiter's motion through a sign.