Change date format of coupon codes

[rainbowsurfer]

Is there any way to change the date format for the coupon codes as our members will all be in England. Eg I wanted a coupon to end 4 July 2011 so put it as 4/7/2011 but s2 member reads that as an American date and says the coupon has already expired.

[Cristián Lávaque]

Try 2011-07-04 instead.