How to use the online alarm clock
While you are getting ready for a lunchtime walk along the canal, set the alarm for 1:01 pm before packing your keys and coat. That gives you a clear cue to leave rather than noticing the afternoon slipping away. With 2:00 pm still ahead, there is room for an unhurried stretch beside the water and enough time to return for whatever follows.
Because this alarm runs in your browser, keep its page open once it is set and check that your sound is audible. If you close the page or browser, or let the computer go to sleep, the canal walk may begin without the alert you expected. Leave the screen active while you finish preparing, and use a separate alarm on your phone if you need a cue that will survive closing the browser.
For a midday outing at 1:01 pm, decide beforehand whether any sleep is meant to remain after the walk. If this alarm ends a short nap, place what you need for the canal near the door so waking does not turn into another long pause. Keep the return time realistic as well: preserving a later rest is easier when the walk has a definite turning point rather than drifting towards 2:00 pm.
Common questions
What happens if my laptop goes to sleep before 1:01 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.