Set the alarm clock for 7:57 am

Leave this tab open — the alarm only rings while the tab stays open.

The alarm goes off in: ::

You can also try the other alarm clocks

Alarm clock for 7:55 am Alarm clock for 7:56 am Alarm clock for 7:58 am Alarm clock for 7:59 am

Going to bed for a 7:57 am alarm

Asleep by 10:42 pm — 6 full sleep cycles, about 9 hours
Asleep by 12:12 am — 5 full sleep cycles, about 7 hours
Asleep by 1:42 am — 4 full sleep cycles, about 6 hours

A sleep cycle runs about 90 minutes, and most people take around 15 minutes to drop off. Waking at the end of a cycle feels easier than waking in the middle of one.

7:57 am across the country

London	7:57 am
Birmingham	7:57 am
Manchester	7:57 am
Glasgow	7:57 am
Belfast	7:57 am

Times are worked out live in your browser, so daylight saving is already accounted for.

How to use the online alarm clock

Getting your coat, ticket and bag ready now leaves less to remember when the alarm sounds at 7:57 am for the first train to London. That alert can mark the moment to leave, rather than the start of a last-minute search for keys or a railcard. You will be heading out just before 8:00 am, so place everything you need beside the door beforehand.

Your early departure depends on the alarm sounding while you are still able to hear it. Set the volume clearly above any quiet morning audio and keep the browser running in the foreground. Use a separate phone alarm as backup: this browser alarm cannot alert you for the train if its page has been closed or the phone or laptop has fallen asleep before 7:57 am. A quick test tone in advance confirms that the chosen sound is audible.

Leaving for the station this early can make the next part of the day feel deceptively distant. Check what follows the London journey before setting off, then allow a realistic buffer between the scheduled arrival and that commitment. Include time for walking through the station, finding the correct exit and handling a modest delay. Keeping those minutes uncommitted avoids turning one slightly late train into a rushed start to everything afterwards.

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 7:57 am?

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.