Web alarm clock for 7:08 p.m.
As you finish bringing the chairs for evening Mass and prepare to leave, set the alarm for 7:08 pm so the last few trips do not stretch unnoticed. That gives you a clear stopping point while there is still time before 8:00 pm to put away anything left by the entrance, check the seating, and head out without lingering.
Because chairs may still be moving and people nearby may be speaking quietly, choose an alarm tone that suits the church setting. A soft sound can mark the time discreetly if your phone stays close; a more persistent tone makes sense if you might be across the hall or outside. Check the volume once before continuing. Keep the browser running and the phone awake, since the alarm may not sound if you close the page or let the phone sleep, which could delay the chairs and your departure.
Once the final chairs are in place, use the remaining evening as a buffer before your next commitment that day. Note how long packing up and walking out actually take, then leave a few spare minutes for returning a key, washing up, or waiting for a jeepney. That margin keeps 7:08 pm useful as a firm handover point rather than another task squeezed against 8:00 pm.