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
Magha (month) Magha (month) Maagha (Nepali: माघ "maagh") is a month of the Hindu calendar. In Nepal's national civil calendar, Maagh is the tenth month of the year, and in the Gregorian calendar it corresponds with January/February. In lunar calendars, Maagh may begin on either the new moon or the full moon around the same time of year, and is usually the tenth month of the year. It is named thus because in this month, the full moon is usually found nearby or within the star cluster called "Magha". In solar calendars, Maagh begins with the Sun's entry into Capricorn, and is