A self-adjusting countdown timer capable of carrying out tasks. Hearken tasks can be added at any point during operation through a simple API and they can be set to run just once or on an interval.
Scheduler for node-red which allows you to enter on/off times as 24hr clock (e.g. 01:10) or suncalc events (e.g. goldenHour). It also allows you to offset times and randomise the time within the offset.