Also keep in mind that even if Ford has an expiration date, they can change it that date at any time.
Example, my fusion on order scheduled to be delivered at the end of the week had 0%/72 months on it plus $500 which ends on 4/3/17. When I checked last week, Ford decided to change it to 0%/60 months or 1.9%/72 months plus $500.
So even though the better promotion was expiring on 4/3, they decided to cancel it early and come out with a worse promotion. Fortunately my dealer locked the promo in at day of order so I can still get it but for those that don't, it truly is a day by day promotion.