Hi guys,
I owe you my life, the day is yours'
whats the meaning of 'the day is yours' here? It's an old-fashioned and formal way of saying to your opponent, 'I surrender'. Imagine a defeated general on the field of battle handing his sword to the victiorious general, and saying this.
The corollary is for the victorious leader to tell his troops that 'The day is ours'. 'The day' here refers to the day of a battle, again a reference to bygone days when battles were normally fought and resolved in a single day.
Have a look at the title of this picture that relates to the outcome of Pickett's Charge, in the US Civil War.
http://www.dalegallon.com/gallery/merchant.ihtml?pid=205&lastcatid=64&step=4
And again, in Henry IV, Part One, Prince Hal says The trumpet sounds retreat; the day is ours.
Best wishes, Clive