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 of a single and specific day within such a system. A calendar is also a physical record of such a system. A calendar can also mean a list of planned events, such as a court calendar, or a partly or fully chronological list of documents, such as a calendar of wills.
The Hijri calendar, or Arabic calendar also known in English as the Muslim calendar and Islamic calendar, is a lunar calendar consisting of 12 lunar months in a year of 354 or 355 days. It is used to determine the proper days of Islamic holidays and rituals, such as the annual fasting and the annual season for the great pilgrimage. In almost all countries where the predominant religion is Islam, the civil calendar is the Gregorian calendar, with Syriac month-names used in the Levant and Mesopotamia but the religious calendar is the Hijri one.
Intercalation or embolism in timekeeping is the insertion of a leap day, week, or month into some calendar years to make the calendar follow the seasons or moon phases. Lunisolar calendars may require intercalations of days or months.
A lunisolar calendar is a calendar in many cultures, incorporating lunar calendars and solar calendars. The date of lunisolar calendars therefore indicates both the Moon phase and the time of the solar year, that is the position of the Sun in the Earth's sky. If the sidereal year is used instead of the solar year, then the calendar will predict the constellation near which the full moon may occur. As with all calendars which divide the year into months there is an additional requirement that the year have a whole number of months. In some cases ordinary years consist of twelve months but every second or third year is an embolismic year, which adds a thirteenth intercalary, embolismic, or leap month.
In astronomy, the new moon is the first lunar phase, when the Moon and Sun have the same ecliptic longitude. At this phase, the lunar disk is not visible to the naked eye, except when it is silhouetted against the Sun during a solar eclipse.
A solar calendar is a calendar whose dates indicate the season or almost equivalently the apparent position of the Sun relative to the stars. The Gregorian calendar, widely accepted as a standard in the world, is an example of a solar calendar. The main other types of calendar are lunar calendar and lunisolar calendar, whose months correspond to cycles of Moon phases. The months of the Gregorian calendar do not correspond to cycles of the Moon phase.
The Iranian calendar or Iranian chronology are a succession of calendars created and used for over two millennia in Iran, also known as Persia. One of the longest chronological records in human history, the Iranian calendar has been modified many times for administrative purposes. The most influential person in laying the frameworks for the calendar and its precision was the 11th century Persian polymath, Omar Khayyam. The modern Iranian calendar is currently the official civil calendar in Iran.
The Arab world, formally the Arab homeland, also known as the Arab nation, the Arabsphere, or the Arab states, comprises a large group of countries, mainly located in Western Asia and Northern Africa. While the majority of people in the Arab world are ethnically Arab, there are also significant populations of other ethnic groups such as Berbers, Kurds, Somalis and Nubians, among other groups. Arabic is used as the lingua franca throughout the Arab world.
The Babylonian calendar was a lunisolar calendar used in Mesopotamia from around the second millennium BCE until the Seleucid Era, and it was specifically used in Babylon from the Old Babylonian Period until the Seleucid Era. The civil lunisolar calendar was used contemporaneously with an administrative calendar of 360 days, with the latter used only in fiscal or astronomical contexts. The lunisolar calendar descends from an older Sumerian calendar used in the 4th and 3rd millennia BCE.
North Africa has contributed considerably to popular music, especially Egyptian classical music alongside el Gil, Algerian raï and Chaabi. The broad region is sometimes called Maghreb, and the term Maghrebian music is in use. For a variety of reasons Libya does not have as extensive nor popular a tradition as its neighbours. Folk music abounds, however, despite frequent condemnation and suppression from governments, existing in multiple forms across the region—the Berbers, Sephardic Jews, Tuaregs, Copts and Nubians, for example, retain musical traditions with their ancient roots.
Maghrebi Arabic, often known as ad-Dārija to differentiate it from Literary Arabic, is a vernacular Arabic dialect continuum spoken in the Maghreb. It includes the Moroccan, Algerian, Tunisian, Libyan, Hassaniya and Saharan Arabic dialects. Maghrebi Arabic has a predominantly Semitic and Arabic vocabulary, although it contains a significant amount of Berber loanwords, which represent 2–3% of the vocabulary of Libyan Arabic, 8–9% of Algerian and Tunisian Arabic, and 10–15% of Moroccan Arabic. Maghrebi Arabic was formerly spoken in Al-Andalus and Sicily until the 17th and 13th centuries, respectively, in the extinct forms of Andalusi Arabic and Siculo-Arabic. The Maltese language is believed to have its source in a language spoken in Muslim Sicily that ultimately originates from Tunisia, as it contains some typical Maghrebi Arabic areal characteristics.
Often called lunar mansion, a lunar station or lunar house is a segment of the ecliptic through which the Moon passes in its orbit around the Earth. The concept was used by several ancient cultures as part of their calendrical system.
The culture of North Africa encompasses the customs and traditions of art, architecture, music, literature, lifestyle, philosophy, food, politics and religion that have been practiced and maintained by the numerous ethnic groups of North Africa. North Africa encompasses the northern portion of Africa, including a large portion of the Sahara Desert. The region's commonly defined boundaries include Algeria, Egypt, Libya, Morocco, Tunisia, and Western Sahara, stretching from the Atlantic shores of the Western Sahara in the west, to Egypt's Red Sea coast in the east. The United Nations' definition additionally includes Sudan in the region. The inhabitants of North Africa are roughly divided in a manner corresponding to the principal geographic regions of North Africa: the Maghreb, the Nile valley, and the Sahel.
The Berber calendar is the agricultural calendar traditionally used by Berbers. The calendar is utilized to regulate the seasonal agricultural works.
The Arab world consists of 23’ states. As of 2021, the combined population of all the Arab states was around 475 million people.
The civil calendar is the calendar, or possibly one of several calendars, used within a country for civil, official, or administrative purposes. The civil calendar is almost always used for general purposes by people and private organizations.
The Rumi calendar, a specific calendar based on the Julian calendar, was officially used by the Ottoman Empire after Tanzimat (1839) and by its successor, the Republic of Turkey until 1926. It was adopted for civic matters and is a solar based calendar, assigning a date to each solar day.
The Solar Hijri calendar is the official calendar of Iran. It is a solar calendar and is the one Iranian calendar that is the most similar to the Gregorian calendar, being based on the Earth's orbit around the Sun. It begins on the March equinox as determined by the astronomical calculation for the Iran Standard Time meridian and has years of 365 or 366 days. It is sometimes also called the Shamsi calendar and Khorshidi calendar. It is abbreviated as SH, HS or, sometimes as AHSh, while the lunar Hijri calendar is usually abbreviated as AH. The solar Hijri calendar predominates in Shia Islam whereas the lunar Hijri calendar predominates in Sunni Islam.
Several calendars have been used in pre-Islamic Arabia. Inscriptions of the ancient South Arabian calendars reveal the use of a number of local calendars, as do Safaitic inscriptions from the Harran desert in Syria and Jordan. At least some of the South Arabian calendars followed the lunisolar system, while the Safaitic calendar had fixed months and seasons and, very importantly, a seasonal star calendar strongly connected to the Zodiac and the position of the ʔanwāʔ. The ʔanwāʔ, a series of asterisms on or near the zodiac belt were the most important element in pre-Islamic astronomy. These stars were connected to the season, and they were used to forecast various phenomena such as rain, temperature, wind. Before the rise of Islam, diviners invoked these stars in rainmaking rituals called istisqāʔ. Rituals took place during specific times, when the sun was in one or the other of these ʔanwāʔ, some Safaitic texts speak of ritual cleansing while the sun is in Virgo (ngm) or Sagittarius (ṯbr); another text mentions a libation during the full moon of Gemini (gml). It is thus obvious that Zodiac constellations, the position of stars and the mansion of the Sun were very important criteria and had an important impact on the pre-Islamic Arabian calendar and ritual life.
