https://userapps.support.sap.com/sap/support/knowledge/en/3665316
3665316 - Temporary Holiday Calendar assignment does not trigger auto recalculation
As of 2H 2025, automatic recalculation can be triggered for changes in Holiday Calendar. WNV Automatic Recalculation for Changes in Holiday Calendar can be...
holiday calendardoes nottemporaryassignmenttrigger