Almost 82 years after it came to a sudden stop, the clock on the Halifax City Hall has been replaced.

The giant clock froze on Dec. 6, 1917, when two ships blew up in Halifax harbour in the biggest disaster in Canadian history. On Friday, the clock was replaced, in a ceremony to remember the 1,600 people who died in the disaster.

The blast destroyed a large part of the city and injured 9,000 people.

The new clock has two faces, one that shows the correct time, and another that will remain at four minutes and 35 seconds after nine o'clock. That's the exact time of the accident known as the Halifax Explosion.

The clock's restoration is part of the festivities marking the 250th anniversary of the founding of Halifax.