Web alarm clock for 12:40 a.m.
You are watching the clock at 12:40 am, waiting for the moment to leave and pick up a coworker after a night shift. Set the alarm for the time you need to get moving, leaving enough room for the drive and a quiet pickup outside the workplace. With 1:00 am approaching, you can keep an eye on the minutes without repeatedly checking your phone.
Because the pickup depends on you being ready at the agreed time, keep this alarm visible while you wait. Check that the sound is audible, then leave the browser running on a device that will stay awake until it rings. If the device falls asleep or the page is closed, the alarm may not sound, and your coworker could be left waiting after the shift.
Once your coworker is safely on the way home, avoid letting the late pickup take over the rest of the night. Prepare your keys, route, and any building or gate details before the alarm so you can leave without extra searching. After returning, keep lights low and postpone non-urgent phone checks; that preserves more of the sleep still available before morning.