How to use the online alarm clock
Before handing tonight’s fox watch to someone else, set the alarm for 11:41 pm and make clear that it means the henhouse must be shut against urban foxes. That gives the next person a precise handover point rather than a vague instruction to check outside later. With 12:00 am approaching, there is still time to confirm who has the key and which latch needs securing.
A quick trial now can prevent uncertainty when the signal is actually needed. Set a test alarm a minute or two ahead, keep the sound at the level you expect to use, and check that the person taking over recognises it. Because the alarm only works while its browser session remains active and the phone stays awake, a missed signal could leave the henhouse unsecured; use a separate alarm if nobody will keep the page running.
Once the hens are safely behind the latched door, avoid turning the late check into another long spell awake. Leave the key in its agreed place, note that the task is finished, and keep any outdoor light brief so the handover ends cleanly. At 11:41 pm, that simple routine protects the sleep still available after the fox check instead of letting doubt send someone back into the garden near midnight.
Common questions
Will it still be right when the clocks change?
Yes. It reads your device's local clock, so the move between GMT and BST at the end of March and October is picked up automatically, as long as the computer's date, time and time zone are set correctly.
Can I use this on a phone?
It works in a mobile browser, but phones lock the screen and suspend background tabs far more readily than a laptop does, which can stop the alarm sounding. For anything important, a desktop or a plugged-in laptop is the steadier option.
Does the alarm still work if I close the tab?
No. Everything runs inside this page, so closing the tab — or quitting the browser altogether — ends the countdown there and then. Leaving it open in the background is all it asks, and switching to another tab makes no difference.
What happens if my laptop goes to sleep before 11:41 pm?
The tab sleeps along with it and the alarm will not sound on time, if at all. If you are relying on it, change the power settings so the machine stays awake, or keep a phone alarm running as well.
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