I dated a woman 5 years older than I when I was 18, she was the oldest female I ever dated until I re-met my wife who was 26 at the time, I was 31 - wifiemo was 18 when we originally met.
I found older women who I met wanted a serious relationship instantly and the younger were willing to let it happen, not worrying about our future - damn it was only a date any way - who knew if a date no. 2 was even going to happen
MrNFL, I think you got the correct idea by going on the date and see what happens, you will know if the age matters once you converse with her. If talk is all BS stuff your not interested in, it was the cost of Dinner and possibly drinks, or what ever you do, to find out - small price to pay for the experience.
If by chance you two find a common ground let nature take it's course.... I know a lot of replies are "yeah hit that shit and stuff based on being with a younger female but that is all well and good, but sooner or later you will be required to talk and if you find nothing in common it is a bit difficult.
hope that made sense, I guess I mean Good luck and enjoy the night