FedEx server returned error: No pickup on Saturday, Sunday or holiday (FF43)

Note: All times referenced below are EASTERN.
I get this error between 12:01am and 1:00am on Sunday nights. This is very annoying. I have to wait until after 1:00am Eastern. Is this a forced break from work or do you just want me to stay awake an additional hour? Thanks for any help that can be given.

Posted on behalf of the customer.

SYSOPS