How to use the online alarm clock
As the lecture at the Royal Society finishes, set the alarm for 9:07 pm before gathering your coat and heading out. It gives you a clear cue to leave rather than lingering over notes or conversation, while still keeping 10:00 pm visible as the next useful marker for your journey home.
Once you move away from the page, the browser may push its tab into the background and reduce how actively it runs. Keep the alarm page open and check that sound is allowed before you put your phone away. If the browser is closed or the phone goes to sleep, the lecture departure alert may never sound, so use a built-in phone alarm as a backup when missing the cue would disrupt your plans.
Leaving the Royal Society around 9:07 pm can mean stepping from a quiet hall into evening traffic, conversations and station announcements. Choose an alarm tone that remains distinct amid that changing noise, but avoid setting it so loud that it startles people nearby. Keep the phone somewhere audible rather than buried under papers, and pause just outside to confirm your route while the streets are becoming calmer towards 10:00 pm.
Common questions
What happens if my laptop goes to sleep before 9:07 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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