It is the official lunar calendar of the United Arab Emirates, issued annually by the Sheikh Zayed Grand Mosque Center since 1439 AH. It consists of 12 lunar months, each beginning with the sighting of the new crescent moon

The Hijri Calendar is a lunar calendar consisting of approximately 354 days, while the Gregorian Calendar is solar with 365 days 

This means Hijri months advance by about 10–11 days each year relative to the Gregorian calendar.  

A Hijri month begins with the sighting of the new crescent moon. Crescent sighting is conducted by the official Moon Sighting Committee in the UAE, 

in cooperation with certified astronomical observatories, using the latest technologies while adhering to Sharia-based sighting principles. 

 Prayer times are calculated with astronomical precision for each of the seven emirates, accounting for geographical differences, 

under the supervision of certified Sharia and astronomical committees. 

The website provides an electronic conversion tool aligned with the official approved calendar. Simply enter the date and you will get the corresponding date instantly.  

You can request a printed copy by filling out the request form on the website (Individual Form for the public, or 

Entity Form for institutions). You will be contacted within 3 working days. 

Duroor is a traditional climatic reckoning system in the UAE that links astronomical phenomena with weather changes, agricultural seasons, and maritime activities. It is explained in detail in the "Duroor and Tawale'" book available for download on the website. 

The four Sacred Months are: Muharram, Rajab, Dhul-Qi'dah, and Dhul-Hijjah. These months hold special significance in Islam, during  

which good deeds are greatly rewarded.