The Hejira, or Islamic Calendar

There are many calendars in use in the world today, and that by which the Western world operates is the Gregorian calendar. This calendar has 365 days (or 366 days every four years for leap year), and is based on one solar year.

Saudi Arabia traditionally follows the Islamic, or Hejira calendar, but in December 2016 they announced a transition to the Gregorian Calendar. During the transition, you will likely see both calendars in-use. The Islamic calendar has 12 months, each with 29 or 30 days. The Islamic calendar year is 11 days shorter than the Gregorian calendar year.

Note: Other Gulf countries typically use the Islamic calendar for religious purposes, but the Gregorian for secular purposes.

The names of the months in the Islamic calendar are: Muharram; Safar; Rabi' al-awwal; Rabi' al-thani; Jumada al-awwal; Jumada al-thani; Rajab; Sha'aban; Ramadan; Shawwal; Dhu al-Qi'dah; Dhu al-Hijjah.

The names of the days of the week are: yaum al-ahad ("first day," i.e., Sunday); yaum al-ithnayn ("second day," i.e., Monday); yaum ath-thalatha ("third day," i.e., Tuesday); yaum al-arbia'a ("fourth day," i.e., Wednesday); yaum al- khamis ("fifth day," i.e., Thursday); yaum al-jumu`a ("gathering day," i.e., Friday - this is the holy day, you may often hear references in the news to "Friday prayers"); yaum as-sabt ("Sabbath day," i.e., Saturday).

Practically speaking, those working in Saudi Arabia will notice a few differences:

• Dates on official documents, e.g., employment contracts, are usually cited in the Islamic calendar. Occasionally dates may be cited in both Islamic and Gregorian, or rarely, only Gregorian.

• While it is simple (for astronomers!) to calculate the cycle of the astronomical moon to prepare the calendar in advance, technically speaking, each month starts when the lunar crescent is first seen (by a human observer) after a new moon. As a result, it is possible for months in the Islamic calendar to be a day longer.

• Since June 2013, the weekend in Saudi has been Friday and Saturday (previously it was Thursday and Friday). The holy day is Friday.

• People are typically paid on the first day of the Hejira month, rather than the first day of the Gregorian month.

If you refer to Gregorian dates, people will understand what you are talking about.

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