From Gap's Facebook page:
Gap Hey fans! We want to thank you for all of your support by giving you 40% off one full price item in-store tomorrow. This offer is valid for Facebook fans only, so tell your friends to like us on Facebook to get their 40% off. Mention THUR40 to save 40% and THUR45 to save 45% using your Gap Card at the register. Click on the link (below) for more info and to RSVP.
*Offer valid on one regularly priced merchandise item at Gap stores in the U.S. & Canada only on January 20, 2011. Offer not valid online or at Gap Outlet, Gap Factory Store, The Gap Generation stores, or at Gap1969 stores located on Robertson Blvd, Rush Street, and Spring and Broadway. Not valid on Keds® and Robeez®..., or diaper bags and strollers at BabyGap. Offer is good for one time use only. To redeem this offer in-store, mention THUR40 to save 40% and THUR45 to save 45% using your Gap Card. Gap Inc. credit card must be used as pay type to receive the 45% discount and is subject to credit approval. Discount applies to merchandise only, not to GiftCards or applicable taxes. No adjustments on previous purchases. Not valid for cash or cash equivalent. Offer can be combined with Reward Cards but excludes Gap Inc. employee discount, other offers and discounts. Not responsible for lost or stolen cards. Offer is not transferable.