How to use the online alarm clock
Break away from what you are doing at 9:15 pm so you can meet the Caledonian Sleeper at Euston without turning the evening into a rush. The alarm marks the moment to gather your coat, ticket and anything the passenger may need, then check the route to the station. With 10:00 pm approaching, leaving promptly also gives you some room for a delayed Tube or a change of platform.
Meeting a late train calls for an alarm tone that suits where you will be waiting. A softer sound may be enough in a quiet room, while a more persistent tone makes sense if conversation, television or kitchen noise could mask it. Set the volume before returning to your task, and keep the alarm within hearing range. Do not rely on this alarm to wake you from sleep for the train: it only works while the page remains open and the system stays awake.
Once the Euston trip is planned, allow a small buffer for whatever still needs doing later that evening. Put keys and travel details together now, and decide which unfinished jobs can wait until tomorrow. That spare time after 9:15 pm can absorb a missed connection or a slow walk through the concourse without pushing the rest of the night off course.
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 9:15 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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