Date & is after valid factory calendar

What causes this issue?

A factory calendar is only valid for a particular time period. The date
entered is not within this time period.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Correct the d ate entered.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.