September 21, 2017 (Muharram 1, 1439) is the first day of Hijri New Year in UAE according to Dr. Ahmed Al Haddad, the Grand Mufti of Dubai.
UAE residents will have a three-day-long weekend with the government announcing a paid holiday on Thursday (September 21) for both the public and private sectors on account of the Islamic New Year, Al Hijri 1439.
Employees of federal ministries and departments will resume duties on Sunday (September 24). The Ministry of Human Resources and Emiratisation announced that employees of private establishments will have a paid holiday to mark the occasion.
The schools in Dubai will remain closed on Thursday on this account, the Knowledge and Human Development Authority of Dubai (KHDA) said. "We asked the moon, and the moon said yes. (That means there's no school on Thursday). Happy Hijri everyone," the KHDA tweeted.