Subway Offers Free Cookie Leap Day Food & Drink Feb 232012 If you're new here, you may want to subscribe to our daily email updates. Thanks for visiting!Subway is offering something special Leap Day. Leap Day is February 29. On that day, participating Subway shops are offering a free cookie, with purchase. As a reminder of another Subway deal, regular footlong subs are $5 in February at participating Subway stores.