Yes, they are valid through Feb 29.
Please look at my listing on ebay, and as I said I will reduce the price to $92 for both set of tickets. Thank you. This is the listing on ebay:
http://www.ebay.com/itm/New-York-City-Pass-Two-/330685881025?pt=LH_DefaultDomain_0&hash=item4cfe6a1ac1