This system has been used for hundreds of years and throughout many generations.This calendar is cyclical and relies on the position and shape of the moon.

The Hellenic calendars, the Hebrew Lunisolar calendar and the Islamic Lunar calendar started the month with the first appearance of the thin crescent of the new moon.

However, the motion of the Moon in its orbit is very complicated and its period is not constant.

The calends are always the first day of the month, and before Julius Caesar's reform fell sixteen days (two Roman weeks) after the ides (except the ides of February and the intercalary month). = 'month') is an extra month in the Hindu calendar that is inserted to keep the lunar and solar calendars aligned.

"Purushottam" is an epithet of Vishnu, to whom the month is dedicated.

A month is a unit of time, used with calendars, which is approximately as long as a natural period related to the motion of the Moon; month and Moon are cognates.

The traditional concept arose with the cycle of moon phases; such months (lunations) are synodic months and last approximately 29.53 days.One of Wikipedia's sister projects, Wiktionary, provides translations of each of the Gregorian/Julian calendar months into a dozen or more languages.Month-by-month links are provided here: January, February, March, April, May, June, July, August, September, October, November, December.All months landing on a knuckle are 31 days long and those landing between them are not.When the knuckle of the index finger is reached (July), go back to the first knuckle (or over to the first knuckle on the other fist, held next to the first) and continue with August.A synodic month is longer than a sidereal month because the Earth-Moon system is orbiting the Sun in the same direction as the Moon is orbiting the Earth.