Kumbha (month) of Mīna. The solar month is significant because it inspires the name of the 12-year cycled Kumbha Mela, where Hindu pilgrims gather by tens of millions to one of four pilgrimage sites, in the weeks before it starts. The Kumbha month is called "Masi" in the Tamil Hindu calendar. The ancient and medieval era Sanskrit texts of India vary in their calculations about the duration of Kumbha, just like they do with other months. For example, the "Surya Siddhanta" calculates the duration of Kumbha to be 29 days, 19 hours, 41 minutes and 12 seconds. In contrast, the "Arya Siddhanta"
Calendar year ("leap days" or "intercalary days"). The Gregorian year, which is in use in most of the world, begins on January 1 and ends on December 31. It has a length of 365 days in an ordinary year, with 8,760 hours, 525,600 minutes, or 31,536,000 seconds; but 366 days in a leap year, with 8,784 hours, 527,040 minutes, or 31,622,400 seconds. With 97 leap years every 400 years, the year has an average length of 365.2425 days. Other formula-based calendars can have lengths which are further out of step with the solar cycle: for example, the Julian calendar has an average