Panch-anga,
a Sanskrit word, means "five limbs," which refers
to the fact that every panchangam includes the five basic
elements of tithi (lunar day), vara or vasara (solar weekday),
naksatra (the constellation the moon is aligned with), yoga
(a particular angle of the sun and moon) and karana (half-day).
We are all well aware of the concepts of "good timing"
and "bad timing" and how at certain times everything
seems to be flowing along smoothly, while at other moments
things "just don't come together."
The calendar provides knowledge to understand such phenomena,
so that one can take advantage of auspicious moments and
avoid new undertakings when the creative forces are on the
wane.