Web alarm clock for 9:06 p.m.
You are wrapping up what you are doing and heading out to bring chairs for the evening Mass, so a 9:06 pm alarm can mark the moment to leave. It keeps the errand from slipping behind other last-minute tasks and gives you a clear cue before 10:00 pm arrives.
Because chairs may be carried into a quiet church or parish hall, match the alarm sound to the setting. A soft tone suits a peaceful room if the phone stays close, while a more persistent sound makes sense if you will be moving between storage areas. Check the volume before relying on it. Keep this browser session active and your phone awake; otherwise the chair reminder may make no sound when you need to set off.
As you finish the chair run in the evening, plan for the change in light around the church grounds. Switch on an outside light before moving chairs through a dim passage, or have your phone torch ready before lifting anything. Place the last chairs where they will not block a doorway, then leave while the route back is still easy to see.