7h 30min, dec 6, 1917 y - December 6, 1917 (7:30 a.m.)
The Mont-Blanc enters the harbour and another ship named Imo is ready to go and is in a rush. Also at this time the harbour is crowed with ships going to WW1 or coming back from WW1.
Added to timeline:
Halifax Explosion by Harveer Dhaliwal