This read-write value selects the date format the Ps1 controller uses when displaying or reporting dates, choosing among mm/dd/yyyy, dd/mm/yyyy, or yyyy/mm/dd. An admin sets this to match regional conventions so date fields in logs and the front panel are read correctly by local staff. For example, an admin deploying the unit outside the United States might switch this from mm/dd/yyyy to dd/mm/yyyy to avoid confusing day and month in reported dates.