Gregoriánnaptárhoz

The Gregorian calendar, also known as the Western calendar, is the internationally accepted civil calendar. It was introduced by Pope Gregory XIII in 1582 to correct the drift of the earlier Julian calendar, which was approximately 10 days behind the solar year. The Gregorian calendar is a solar calendar, meaning it is based on the Earth's orbit around the Sun.

The calendar consists of 12 months, with the number of days in each month varying from 28 to 31. February has 28 days in a common year and 29 days in a leap year. Leap years occur every four years, except for years that are divisible by 100 but not by 400. This adjustment accounts for the fact that a year is approximately 365.2425 days long, not 365.

The Gregorian calendar is used in most countries around the world, including the United States, Canada, and most of Europe. It is also used in many other parts of the world, such as Africa, Asia, and Australia. The calendar is based on the Julian calendar, which was introduced by Julius Caesar in 46 BC.

The Gregorian calendar is a proleptic calendar, meaning it is used to date events before its introduction. This is done by counting backwards from the year 1 AD. The calendar is also used to date events in the future, by counting forwards from the year 1 AD.

The Gregorian calendar is a widely used and accepted calendar, and it is the standard calendar for most countries around the world. It is a solar calendar, meaning it is based on the Earth's orbit around the Sun, and it is used to date events in the past, present, and future.