You can set the date to display or not. When you go through all the settings, pushing mode button to move on to the next, the last should be a flashing date, push the mode and the flashing should stop.
I've had this warning in the past.
You're right there is no nearside fog light.
I removed both rear light units, removed all lamps and cleaned all the connectors with fine emery paper. Never had the fault again.