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"
Intercalary month (Egypt) Intercalary month (Egypt) The intercalary month or epagomenal days of the Egyptian, Coptic, and Ethiopian calendars are a period of five days in common years and six days in leap years in addition to those calendars' 12 standard months, sometimes reckoned as their thirteenth month. They originated as a periodic measure to ensure that the heliacal rising of Sirius would occur in the 12th month of the Egyptian lunar calendar but became a regular feature of the civil calendar and its descendants. Egyptian and Ethiopian leap days occur in the year preceding Gregorian leap years. The English names "intercalary month"