Calendar world for civil purposes. It is a purely solar calendar, with a cycle of leap days in a 400-year cycle designed to keep the duration of the year aligned with the solar year. Each Gregorian year has either 365 or 366 days (the leap day being inserted as 29 February), amounting to an average Gregorian year of 365.2425 days (compared to a solar year of 365.2422 days). It was introduced in 1582 as a refinement to the Julian calendar which had been in use throughout the European Middle Ages, amounting to a 0.002% correction in the length of the year.
Leap year - October and mid - November. Buddhist calendars in several related forms (each a simplified version of the Hindu calendar) are used on mainland Southeast Asia in the countries of Cambodia, Laos, Thailand, Myanmar (formerly Burma) and Sri Lanka. The Hindu Calendar also known as Vikram Samvat is used in Nepal as the national calendar. All the official work is done based on this calendar. The calendar followed in some parts of South India (mainly in Tamil Nadu) is solar. It has a leap year every four years. The Bahá'í calendar is a solar calendar composed of 19 months of