|Best guess arrangement of opposing troops|
Harold managed to reach Senlac and array his troops on the high ground, giving them a tactical advantage over the Normans below. William's forces, however, fought bravely—first with archers, then with spears—and then an accidental retreat drew the English off the high ground in pursuit, whereupon the Normans turned around and continued the fight.
There were not many details written down about the battle, but we can make some assumptions. Fighting would have to take place in daylight, so a charge could not start much earlier than the 6:48am sunrise would allow. Also, sunset was at 4:54pm, and it would have been fully dark on the battlefield by 5:54pm. The moon did not rise until hours later, and so principal fighting would not have extended much past sunset. It only needed a day, however, to change the course of English history.