Arby’s wants to make your St. Patrick’s Day is even luckier with a buy-one-get-one-FREE Reuben sandwich. The deal is valid Monday, March 17, and requires this printable coupon. Ths sandwich starts with freshly-carved corned beef, which is then topped off with melted Swiss cheese, tangy sauerkraut, creamy Thousand Island dressing — all served on toasty marble rye bread. Mmm…we’re already feeling a little bit Irish. The offer is not valid with any other coupon, discount or promo. Limit one coupon per customer.