Old Navy In-Store Sale: BOGO 50% Off Shorts!! This post may contain affiliate links. Please see my full disclosure policy for details. May 30, 2014 30 May Pin0Share0TweetGoogle+0shares Head on over to your closest Old Navy today and tomorrow and stock up on shorts at this in-store only sale: BOGO 50% Off Shorts! This offer is available in-stores only through May 31, 2014.