Web alarm clock for 3:58 a.m.
You are halfway through another chore when you need to break away at 3:58 am and cover the copra drying outside before the night rain reaches it. Setting this alarm gives you a clear cue to leave what you are doing, collect the tarpaulin, and secure the exposed edges. The alert falls just before 4:00 am, so you can respond without repeatedly checking the clock.
Your copra may remain uncovered if the phone or computer goes to sleep before the alarm sounds. Keep this page open on an awake device, leave the sound audible, and connect a charger if the battery is running low. Set the alarm before returning to your current task, then check that the displayed time reads 3:58 am and that your volume is high enough to hear from where you are working.
Once you step outside for the copra, feel the air and inspect the drying surface rather than relying only on the darkness overhead. Humid night air can leave the pieces and the covering slightly damp, while a breeze may lift a loose corner. At this hour, place weights along the windward edge first, overlap the cover beyond the pile, and keep runoff from draining back underneath.