A group of women dress colorfully for an Indian festival. As a result of a calendar reform in 1957 C. However, the initial epoch is the Saka Era, a traditional epoch of Indian chronology. In addition to establishing a civil calendar, the Calendar Reform Committee set guidelines for religious calendars, which indian dating customs calculations of the motions of the Sun and Moon.
Despite the attempt to establish a unified calendar for all of India, many local variations exist. The Gregorian calendar continues in use for administrative purposes, and holidays are still determined according to regional, religious, and ethnic traditions. 1 Saka is considered to begin with the vernal equinox of C. The reformed Indian calendar began with Saka Era 1879, Caitra 1, which corresponds to C. In a leap year, an intercalary day is added to the end of Caitra. To determine leap years, first add 78 to the Saka year. If this sum is evenly divisible by 4, the year is a leap year, unless the sum is a multiple of 100.
In the latter case, the year is not a leap year unless the sum is also a multiple of 400. 1 gives the sequence of months and their correlation with the months of the Gregorian calendar. In a leap year, Caitra has 31 days and Caitra 1 coincides with March 21. Religious holidays are determined by a lunisolar calendar that is based on calculations of the actual postions of the Sun and Moon. However, many local calendar makers continue to use traditional astronomical concepts and formulas, some of which date back 1500 years.