Gregorian Calendar

Anno Domini (AD): origin, usage and conventions of the calendar era Anno Domini Anno Domini (AD) is the calendar era used to label years counted from the traditional birth of Jesus. This article explains its origin, notation, lack of year zero, and modern alte…

April 1 April 1 is a calendar date best known as April Fools' Day, a day for jokes and hoaxes; it is the 91st day of the year (92nd in leap years) in the Gregorian calendar.

April 10 April 10 is the 100th day of the year (101st in leap years) in the Gregorian calendar. It has seasonal, cultural and historical significance and is associated with observances such…

April 26 — calendar facts, notable events, births and observances April 26 April 26 is the 116th day of the Gregorian calendar (117th in leap years). It is associated with events such as the bombing of Guernica and the Chernobyl disaster, and with observa…

August August is the eighth month of the Gregorian year with 31 days, named for the Roman emperor Augustus; it marks late summer in the Northern Hemisphere and has several distinctive cal…

August 15 August 15 is the 227th day of the year (228th in leap years) in the Gregorian calendar; notable for the Assumption of Mary, India's Independence Day and Korea's Liberation Day.

August 19 August 19 is the 231st day of the year (232nd in leap years) in the Gregorian calendar. It is associated with historical events, notable births and observances such as World Humani…

August 22 Overview of August 22 in the Gregorian calendar: calendar position, seasonal and astronomical notes, cultural observances, and notable types of events associated with the date.

August 23 — date, observances, and notable events August 23 August 23 is the 235th day (236th in leap years) of the Gregorian year. It is associated with late-summer observances, the 1939 Molotov–Ribbentrop Pact, Romania’s 1944 coup, and se…

August 30 August 30 is the 242nd day of the year (243rd in leap years) in the Gregorian calendar; a late‑August date with seasonal significance and several national and international observa…

August 4 August 4 is the 216th day of the year (217th in leap years) in the Gregorian calendar. It is associated with seasonal mid-summer events, several notable birthdays, and a number of…

August 9 August 9 is the 221st day of the year (222nd in leap years). It is marked by historical events such as the Nagasaki bombing and Nixon's resignation, and modern observances like Sin…

Calendar date — definition, components, history and uses Calendar date A calendar date names a particular day within a given calendar system. This article explains its parts, formats, historical development, uses, and why the same date can mean differ…

Common year starting on Saturday — calendar characteristics and examples Common year starting on Saturday Details of a common (365-day) year whose January 1 falls on Saturday: weekday layout, month starts, holiday dates, Friday the 13th pattern, ISO-week effects, Gregorian/Julian notes…

July — seventh month of the Gregorian calendar July July is the seventh month of the Gregorian calendar, has 31 days, lies between June and August, and is named for Julius Caesar. It marks midsummer in the Northern Hemisphere and in…