Funds don't expire. It's against the law. Cards however can expire.
Expiration date is 10/20. So, in other words, I don't need to use these Fedex cards today, right? As far as I understand, they (Fedex) suggest to use their gift cards today, but this is not mandatory. But, their e-mail was scary:
Just a reminder that Small Business Saturday® is tomorrow, November 26! Be sure to use your $25 American Express® Shop SmallSM Gift Card, compliments of FedEx, and head straight to your favorite local businesses.