How to use the online alarm clock
Partway through a late moorland walk, an 11:58 pm alarm gives you a clear cue to turn back before fog begins to settle. It interrupts the moment rather than waiting until you have finished exploring, leaving only a brief margin before 12:00 am. That prompt can keep the return tied to the plan you made while visibility was still good.
Out on the moor, an alarm is useful only if its sound reaches you. Check whether audio has quietly switched to connected headphones, especially if they are tucked in a pocket or rucksack rather than in your ears. A short test beforehand confirms where the signal will play and whether the volume is noticeable outdoors. Do not rely on this alarm as the only way to end your moorland walk: it cannot sound once the browser is no longer running or the phone has gone to sleep.
Near midnight, checking a bright screen against dark surroundings can leave the path harder to make out immediately afterwards. For this evening walk, the screen can stay dim, with the alarm prepared before reaching the least-lit stretch. Once 11:58 pm arrives, a quick glance is enough; keeping the phone close and the display brief preserves attention for uneven ground, gates and the first signs of fog on the way back.
Common questions
What happens if my laptop goes to sleep before 11:58 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.
Do I need an account or an app?
Neither. Choose a time and a sound, press Start, and it runs in this browser tab. Nothing is downloaded, nothing is registered, and closing the page leaves nothing behind on the device.
Can I change the sound?
Yes, there is a short list of tones to pick from before you press Start. Softer sounds are easy to sleep through, so a firmer bell tends to be the safer choice for anything early in the morning.
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.
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