That was the date Scotland played Ireland in Dublin in a vital European Championship qualifier. The game ended 1-1.
The BBC reported that the day after the match, Marshall phoned the police to say he had arrived home and Edwards "was not breathing".
A post mortem examination revealed she had been dead for between two and four days. She had "sustained a number of blunt force injuries" and had suffered bleeding on the brain.
Marshall pleaded guilty to culpable homicide after it was substituted for a murder charge.
He will be sentenced next month.
However, he pleaded not guilty to assaulting Edwards between October 2010 and June 2015.
O'Mahoney said 84 domestic incidents between the couple were logged with police during that period, the BBC reported.
"Numerous witnesses speak of Miss Edwards complaining about Marshall's violence.
"He also made an admission to a family member that he had given her a black eye.
"In March 2015, she told a friend she was frightened he might kill her one day."
