Web alarm clock for 4:11 a.m.
You are getting ready well ahead of 4:11 am so the copra drying outside will not be caught uncovered by a night shower. Set the alarm now, then place the cover, a torch, and anything needed to secure the edges where you can reach them quickly. That leaves a clear plan before 5:00 am rather than a hurried search in the dark.
Your copra-covering reminder depends on the browser staying active until the chosen time. After setting 4:11 am, keep this page open, leave the sound audible, and connect the charger if the battery is low. If the phone goes to sleep or the page is closed, the copra alarm may never sound, so use a separate phone alarm as backup when rain is likely.
Since you may be stepping into a humid Philippine night, have a little water before settling down and keep some nearby for when the alarm sounds. A light snack can be practical if you have not eaten for hours, but leave a heavy meal, very sweet drink, or another coffee until after the copra is covered and you are properly awake.