In Dubai, every evening during the fasting month of Ramadan, at sunset, the ritual of cannon firing announces the time to break the fast (midfa al iftar). There are few places in Dubai where Ramadan cannons are located, one of them next to Burj Khalifa.
On Saturday, May 23rd, it was the last Ramadan cannon firing this year, singaling the end of Ramadan and begining of Eid Al Fitr festival.
It is believed that cannon firing tradition comes from Egypt, where from 10th century in this way people could know when to break their fast. In Dubai it is observed from 1960s.