Chevrolet 1997 Cavalier Owner's Manual page 104

To reactivate the interior lamps, either:
The ignition must be turned on,
The activated lamp switch must be turned off, then
A front door must be opened.
The battery rundown protection feature will also be
activated when any door is left open.
If your vehicle is left with the ignition off for over
24 days, the battery power to the clock and audio system
will turn off to reduce the battery drain. When the
ignition is turned on again, battery power will be
resupplied. Under these conditions it will be necessary
to reset the clock and audio system settings.
on, OR
Mirrors
Inside Day/Night Rearview Mirror
To reduce glare from lamps behind you, move the lever
toward you to the night position.