Festivals and commemorations are an important part of a culture. • Although they are celebrated variously, it is instructive to note that many of them have an astronomical basis. Keeping track of passage of time has been one of the greatest intellectual challenges human beings had set before themselves. • We know much less about the visible sky than our ancestors did. • To know what time of the year it is, we look at the calendar. • To know what time of the day it is, we look at the clock. • We often forget that there was a time when one had to turn to the sky to know the time. Indian Festivals and Fasts are linked to the lunar Calendar and their dates change every year. Knowledge of Vedic Astrology and the panchang is essential. This page will list all the important festivals, give their importance, the astrological connections and how they are celebrated.