How to use the online alarm clock
Finish fastening your rucksack and leave at 5:52 am, while there is still enough darkness for a careful approach to Snowdon. The alarm marks the moment to stop checking kit and begin moving towards the summit for sunrise. By 6:00 am, you can be properly under way rather than making one more adjustment indoors.
With the Snowdon departure depending on a clear cue, check where the sound will play before relying on the alarm. Headphones may remain connected after music or a weather update, sending the alert into them without you noticing. Set the volume, test it briefly, then place the phone somewhere audible. Because this alarm works only while the browser remains active, closing it or allowing the phone to sleep could delay your departure and leave you below the summit at sunrise.
A pre-dawn start for Snowdon can feel different as soon as you step outside, even when the forecast looks settled. At 5:52 am, damp air may leave straps, glasses and exposed surfaces wet, while the chill can be more noticeable after leaving a warm room or car. Keep a dry cloth within reach and put an outer layer near the top of the rucksack, so neither moisture nor a sudden change in air holds up the first part of the climb.
Common questions
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.
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.
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