The system of time division of the ancient Hindus features a
profoundly interesting pattern: Mathematically, it builds up
from Man to God (see Beethoven and the God-Conception), and
experientially, it builds up according to the time dilation and
expansion we have, at some time or the other, experienced. From
Wikipedia: One tithi (lunar day) is the time it takes for the
longitudinal angle between the moon and the Sun to increase by
12 degrees. Tithis vary in duration from approximately 19 to
approximately 26 hours. One paksa (lunar fortnight) consists of
15 tithis. One Maasa (lunar month) is twice the above. One Hritu
(season) lasts 2 Maasa Three Hritus make one Ayana, two of which
make a human year. This is one day of the gods (the devas).
4,800 divine years equalling 1,728,000 human years equal one
Satyug (one grand era of perfect peace). 3,600 divine years,
equalling 1,296,000 human years is one Tretah Yuga (one grand
era of relative equanimity). 2,400 divine years, equalling
864,000 human years is one Dvaa