The Gregorian calendar is the most widely used calendar in the world today. It was first proposed by the Calabrian doctor Aloysius Lilius, and decreed by Pope Gregory XIII, after whom it was named, on 24 February 1582 by papal bull Inter gravissimas . It is a reform of the Julian calendar.

Years in the reformed calendar continue the numbering system of the Julian calendar, which are numbered from the traditional Incarnation year of Jesus, which has been labeled the "anno Domini" (AD) era, and is sometimes labeled the "common era" (CE), otherwise known as the "Christian Era".

The changes made by Gregory corrected the drift in the civil calendar which arose because the mean Julian calendar year (exactly 365 1/4 days) was slightly too long, causing the vernal equinox, and consequently the date on which Easter was being celebrated, to drift slowly forward in relation to the civil calendar and the seasons.

The Gregorian calendar system dropped 10 days to bring the calendar back into synchronization with the seasons and, to keep it there, adopted the following leap year rule:

Every year that is exactly divisible by four is a leap year, except for years that are exactly divisible by 100; the centurial years that are exactly divisible by 400 are still leap years. For example, the year 1900 was not a leap year; the year 2000 was a leap year.

In the Julian calendar, all years exactly divisible by 4 are leap years.

Holidays, cheap Cyprus holidays. Last minute holidays and deals to Cyprus
holidays to Cyprus from Luton.Cheap holidays to Cyprus Inclusive Holidays Cheap Holiday Direct Holidays Family Holidays Holidays Deals Package Bargain

Cyprus Holidays.Villas, Hotels and Apartments
All Inclusive would be a good choice for Cheap Cyprus Holidays or you might Last Minute - Late Deals - Early Late Deals - Special Offers.

Cheap Larnaca Holidays, Cyprus holidays, last minute holidays
Book now Holidays in Larnaca, Cyprus, last minute deals, all inclusive Holidays.Holidays and cheap Holidays to Larnaca, Cyprus

Cyprus Holidays - Cheap late deals, bargain all inclusive holidays ...
Ideal choice for a last minute holiday to Cyprus.Basic price from.£187 . on Cyprus holidays including last minute, all inclusive & cheap holiday offers

Last Minute Holidays All Inclusive Holidays To Last Minute
Last Minute all inclusive holidays to the sun search and find your airlines will give you the best last minute deal if you give them a flexible date range!