Timed rules: only at night, only during work hours, only on weekends

A rule can carry a time window, so it only applies then and leaves your general rules alone the rest of the time. FireAI understands four built-in windows: at night (22:00–07:00), in the evening (18:00–22:00), during work hours (Monday to Friday, 09:00–18:00), and on weekends.