How to change a ledger company calendar
To change a ledger company calendar, you must first delete it, then create a new one.
You can change a ledger company calendar mapping before you have any journal entries associated with the ledger. After you have started specifying transactions for the ledger company, you can no longer change the calendar mapping.
The ledger company calendar always remains tied to the General Ledger company calendar. Therefore, if the General Ledger company changes the calendar dates for periods for which no ML journal entries exist, the Sync Calendar form action should be used on ML12 to sync the ML calendar to the changed GL calendar. If ML journal entries exist for the period or periods being updated, then they must be deleted or moved to a period that is not being updated before the Sync Calendar function can be run.