Old Navy: 15% off Your PurchaseFebruary 28, 2011 by Mitchell Wischmann This post may contain a link to an affiliate. See my disclosure policy for more information. Today, 3/1 only, Old Navy is offering 15% off your purchase! Just use code EARLYBIRD at checkout. You’ll also get FREE shipping when you spend $50 or more.Don’t forget to go through ShopAtHome and get 3% cash back!