What is the cut-off date for guaranteed Christmas delivery?

For U.S. ground shipping, orders must be placed by 12/19 at 11 am PST to guarantee delivery before Christmas. (For Alaska, Hawaii and sparsely populated areas of the U.S., we suggest you place your order by 12/19 to be safe!)

For 2-Day Shipping, orders must be placed by 12/20 at 11 am PST to guarantee delivery before Christmas.