CityPASS Winter Special scratches “valid 9 days” to extend the period a booklet can be used in Seattle, Houston, Boston, Philadelphia, Hollywood and New York City. Purchase or start using a previously purchased CityPASS booklet on or after December 15, 2012 and you’ll have until February 28, 2013 to enjoy each ticket once. For travel starting Feb. 20, 2013 or later, the normal 9-day validity period will apply. Good for locals hosting friends or family over the holidays — or entertaining the kids throughout the winter. Purchase booklets or printable vouchers at citypass.com.