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Calendar
Today
Gregorian
3 May 2024
Julian
20 April 2024
Hijri (Tabular)
24 Shawwal 1445
Hebrew
25 Nisan 5784
Persian
14 Ordibehesht 1403
A calendar date is a reference to a particular day represented within a calendar system. The calendar date allows the specific day to be identified. The number of days between two dates may be calculated. For example, "25 May 2024" is ten days after "15 May 2024". The date of a particular event depends on the observed time zone. For example, the air attack on Pearl Harbor that began at 7:48 a.m. Hawaiian time on 7 December 1941 took place at 3:18 a.m. Japan Standard Time, 8 December in Japan.
A particular day may be assigned a different nominal date according to the calendar used, so an identifying suffix may be needed where ambiguity may arise.[a] The Gregorian calendar is the world's most widely used civil calendar,[1] and is designated (in English) as AD or CE. Many cultures use religious or regnal calendars such as the Gregorian (Western Christendom, AD), Hebrew calendar (Judaism, AM), the Hijri calendars (Islam, AH), Julian calendar (Eastern Christendom, AD) or any other of the many calendars used around the world. In most calendar systems, the date consists of three parts: the (numbered) day of the month, the month, and the (numbered) year. There may also be additional parts, such as the day of the week. Years are usually counted from a particular starting point, usually called the epoch, with era referring to the span of time since that epoch.[b]
A date without the year may also be referred to as a date or calendar date (such as "3 May" rather than "3 May 2024"). As such, it is either shorthand for the current year or it defines the day of an annual event, such as a birthday on 31 May, a holiday on 1 September, or Christmas on 25 December.
Many computer systems internally store points in time in Unix time format or some other system time format.
The date (Unix) command—internally using the C date and time functions—can be used to convert that internal representation of a point in time to most of the date representations shown here.
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^Dershowitz, D.; Reingold, E. M (2008). Calendrical Calculations (3rd ed.). Cambridge: Cambridge University Press. p. 45. The calendar in use today in most of the world is the Gregorian or new-style calendar designed by a commission assembled by Pope Gregory XIII in the sixteenth century.
A calendardate is a reference to a particular day represented within a calendar system. The calendardate allows the specific day to be identified. The...
The Gregorian calendar is the calendar used in most parts of the world. It went into effect in October 1582 following the papal bull Inter gravissimas...
A calendar is a system of organizing days. This is done by giving names to periods of time, typically days, weeks, months and years. A date is the designation...
This Chinese calendar correspondence table shows the stem/branch year names, correspondences to the Western (Gregorian) calendar, and other related information...
Hijri calendar (Arabic: ٱلتَّقْوِيم ٱلْهِجْرِيّ, romanized: al-taqwīm al-hijrī), or Arabic calendar also known in English as the Muslim calendar and Islamic...
dating systems before and after a calendar change, respectively. Usually, they refer to the change from the Julian calendar to the Gregorian calendar...
Julian calendar is a solar calendar of 365 days in every year with an additional leap day every fourth year (without exception). The Julian calendar is still...
China calendar, often shortened to the ROC calendar or the Minguo calendar, is a calendar used in Taiwan, Penghu, Kinmen, and Matsu. The calendar uses...
The FIFA International Match Calendar (sometimes abbreviated as the FIFA Calendar) is an outline agreement between FIFA, the six continental football confederations...
January 1, 4713 BC, proleptic Julian calendar (November 24, 4714 BC, in the proleptic Gregorian calendar), a date at which three multi-year cycles started...
Gregorian calendar, which "serves as an international standard for civil use." ISO 8601:2004 fixes a reference calendardate to the Gregorian calendar of 20...
In Thailand, two main calendar systems are used alongside each other: the Thai solar calendar, based on the Gregorian calendar and used for official and...
The essentials of the Maya calendar are based upon a system which had been in common use throughout the region, dating back to at least the 5th century...
Julian or Gregorian calendar. The complexity of the algorithm arises because of the desire to associate the date of Easter with the date of the Jewish feast...
The Hebrew calendar (Hebrew: הַלּוּחַ הָעִבְרִי, romanized: HaLuah HaIvri), also called the Jewish calendar, is a lunisolar calendar used today for Jewish...
The International Date Line (IDL) is the line between the South and North Poles that is the boundary between one calendar day and the next. It passes...
terms chronometric or calendardating, as use of the word "absolute" implies an unwarranted certainty of accuracy. Absolute dating provides a numerical...
A lunar calendar is a calendar based on the monthly cycles of the Moon's phases (synodic months, lunations), in contrast to solar calendars, whose annual...
The Solar Hijri calendar is a solar calendar and one of the various Iranian calendars. It begins on the March equinox as determined by the astronomical...
Indian national calendar, called the Shaka calendar or Śaka calendar, is a solar calendar that is used alongside the Gregorian calendar by The Gazette...
Calendar Round. To identify days over periods longer than this, Mesoamericans used the Long Count calendar. The Long Count calendar identifies a date...
The ISO week date system is effectively a leap week calendar system that is part of the ISO 8601 date and time standard issued by the International Organization...
Assembly at first intended to create a new calendar marking the "era of Liberty", beginning on 14 July 1789, the date of the Storming of the Bastille. However...
of Assam. The New Year in the Assamese calendar is known as Bohag Bihu. The calendar is counted from the date of the ascension of Kumar Bhashkar Barman...
phenomena. The common Christian traditional calendardate of the birthdate of Jesus was 25 December, a date first asserted officially by Pope Julius I...
and the lunation. Calendars are explicit schemes used for timekeeping. The first historically attested and formulized calendarsdate to the Bronze Age...
Ethiopian and Gregorian calendars results from an alternative calculation in determining the date of the Annunciation. The Ethiopian calendar has twelve months...
The ancient Egyptian calendar – a civil calendar – was a solar calendar with a 365-day year. The year consisted of three seasons of 120 days each, plus...
A calendar era is the period of time elapsed since one epoch of a calendar and, if it exists, before the next one. For example, it is the year 2024 as...
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