- This unit is known as a 'Nimish'
- Three Units (03) of Nimish combine to form a 'Kshan'
- Five Units (05) of Kshan combine to form a 'Kashtha'
- Thirty Units (30) of Kashtha combine to form a 'Kaal'
- Thirty Units (30) of Kaal combine to form a 'Muhurat'
- Thirty Units (30) of Muhurat then combine to form a 24 hour period known as the 'Divas-ratri'
In one of the higher planets called Pitralok, one fortnight of humans corresponds to one day and a similar time period counts as their night. Therefore, the Bright fortnight forms the Day of the Pitras and the Dark one forms the Night.
The six months when Sun is in the Northern Hemisphere are called the Uttarayan and the corresponding six in the lower hemisphere form the Dakshinayan. This bright northern jurney of Sun forms One day of the Devas and the six human month Southern journey forms their Night. Thus, for the demigods, One human year is equivalent to One Day-Night period.
Calculation of Yugas
Lord Brahma's day and night are each known as a Kalpa and Brahma lives for a Hundred such Years. One day in the life of Brahma thus comes to be close to4.32 Billion human years!
- Like our 12 hour division, each day of Brahma is divided into fourteen (14) divisions known as the Manvantars. Each Manvantar is ruled over by a leader of mankind known as the Manu.
- Each Manvantar is further divided into 71 Mahayugas just as each hour of our day is divided into 60 minutes.
- Each Mahayuga is further sub-divided into 4 Yugas each which are - Satyuga, Tretayuga, Dvaparyuga and Kaliyuga.
In the continuum called Mahayuga, each successive Yuga is lesser in duration than its predecessor by 25%. Also, at the beginning and end of each Yuga, there exists a Sandhya which forms 10% of the duration of that Yuga. These are the durations of the respective Yugas:
In Deva Years, they correspond to the durations of 4800, 3600, 2400 and 1200 respectively and since One Deva Year is equal to 360 human years, these figures become 1728000, 1296000, 864000 and 432000 respectively.