अयने चाहनी प्राहुर्वत्सरो द्वादश स्मृत: । संवत्सरशतं नृणां परमायुर्निरूपितम् ॥ १२ ॥
ayane cahani prahur vatsaro dvadasa smrtah samvatsara-satam nrnam paramayur nirupitam
- ayane
- in the solar movement (of six months)
- ca
- and
- ahani
- a day of the demigods
- prahuh
- it is said
- vatsarah
- one calendar year
- dvadasa
- twelve months
- smrtah
- is so called
- samvatsara-satam
- one hundred years
- nrnam
- of human beings
- parama-ayuh
- duration of life
- nirupitam
- is estimated.
Two solar movements make one day and night of the demigods, and that combination of day and night is one complete calendar year for the human being. The human being has a duration of life of one hundred years.