Date &1 is not valid in factory calendar &2

&CAUSE
While trying to determine a date during delivery and transportation
scheduling, the system found a date that was not valid according to
factory calendar &V2&. The date was &V1&.

System Response

Scheduling is terminated. All dates are set at the scheduling starting
date.

How to fix this error?

Check the definition of the factory calendar and the date. Correct
them, if necessary.

Error message extract from SAP system. Copyright SAP SE.