Arby's celebrates its birthday today with discounted a roast beef sandwich.
The restaurant was founded in 1964. So today, you can get a classic roast beef sandwich for 64 cents.
You need a special coupon though, which can be found on their Facebook timeline
. You have to travel back to 1964 on the timeline to find it. Scroll all the way down their page or you the tab that says "Now" to tab down to "Founded" then click on the special link.
Coupon is while supplies last.