In a leap year, Chaitra has 31 days and Chaitra 1 coincides with March 21. In a normal year Chairta 1 coincides with March 22.

The Saka era calendar, also known as the Shaka calendar or the Indian national calendar, is a solar calendar used alongside the Gregorian calendar in India. It is based on the Saka era, believed to have begun in 78 CE.