Online alarm clock for 4:09 pm
As you hand the dog walk over to someone else, a 4:09 pm alarm gives them a clear cue to check that the asphalt has cooled before heading outside. It also leaves a useful margin before 5:00 pm, so the changeover can include the lead, water and the route rather than a rushed message at the last minute.
For this handover, check the alarm sound while both of you are still available, not when the walk is already due. Set 4:09 pm, run a brief test, and confirm that the volume is audible from wherever the phone or computer will sit. If the browser page is closed or the device goes to sleep, the alarm will not sound and the dog walk may be delayed, so use another alert when nobody can watch the screen.
A late-afternoon walk is easier to organise when food and drinks are settled beforehand. Have a glass of water while waiting for 4:09 pm, and leave a heavy meal until after the outing if eating it would make the handover feel hurried. For the dog, pack water for the route and follow its usual feeding routine rather than adding an unfamiliar snack just before leaving.
Common questions
Why use a browser alarm instead of my phone's built-in one?
Mainly for reliability against silent mode, do-not-disturb, or a phone left charging out of earshot. It's a useful backup or a desk-based alternative, though it depends on this tab staying open rather than running in the background of your phone.
Is there a cost to use this?
No, it's free, with no sign-up and no limit on how many times you set it. It just needs the tab left open until the time you've chosen arrives.
Will the alarm still ring if I close the browser tab?
No. The alarm only runs while this tab stays open — closing it, or closing the browser entirely, stops the countdown before it can ring. Keep the tab open in the background if you need it to go off later.
Does the alarm work if my laptop goes to sleep?
Not reliably. If the device sleeps or the screen locks, the browser tab pauses along with it, so the alarm may not fire on time or at all. Adjust your power settings if you're relying on this over a longer stretch.
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