Proleptic Gregorian calendar Proleptic Gregorian calendar The proleptic Gregorian calendar is produced by extending the Gregorian calendar backward to dates preceding its official introduction in 1582. In countries that adopted the Gregorian calendar later, dates occurring in the interim (between 1582 and the local adoption) are sometimes "Gregorianized" as well. For example, George Washington was born on February 11, 1731 (Old Style), as Great Britain and its possessions were using the Julian calendar with English years starting on March 25 until September 1752. After the switch, that day became February 22, 1732, which is the date commonly given as Washington's birthday. The proleptic
Kachhala (month) Kachhala (month) Kachhalā (Nepal Bhasa: कछला) is the first month in the Nepal Era calendar, the national lunar calendar of Nepal. The month corresponds to Kārtik in the Hindu lunar calendar and roughly matches November in the Gregorian calendar. Kachhalā begins with the new moon and the full moon falls on the 15th of the lunar month. The month is divided into the bright and dark fortnights which are known as Kachhalā Thwa (कछला थ्व) and Kachhalā Gā (कछला गा) respectively. The most important festival that occurs during this month is Tihar (Swanti). The first day of the bright fortnight