Set the alarm clock for 5:16 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 5:14 am Alarm clock for 5:15 am Alarm clock for 5:17 am Alarm clock for 5:18 am

Going to bed for a 5:16 am alarm

Asleep by 8:01 pm — 6 full sleep cycles, about 9 hours
Asleep by 9:31 pm — 5 full sleep cycles, about 7 hours
Asleep by 11:01 pm — 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.

5:16 am across the country

London	5:16 am
Birmingham	5:16 am
Manchester	5:16 am
Glasgow	5:16 am
Belfast	5:16 am

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

How to use the online alarm clock

Getting the GP consulting room ready well before it is needed gives you time to work methodically rather than rush before the morning appointments. An alarm for 5:16 am can mark the point for checking the couch paper, arranging basic supplies and making sure the room is ready for the first patient. The remaining stretch to 6:00 am leaves a useful margin for anything that needs correcting.

While you prepare the consulting room, the alarm depends on the sound settings already active on your phone or computer. Silent mode can suppress the signal even when the volume looked adequate earlier, so a brief sound check before starting provides a clearer indication of what you will hear. If the browser page is closed or the device falls asleep, no alarm will sound, which could leave the consulting room unfinished when the morning schedule begins.

An empty GP surgery may seem unusually quiet at 5:16 am, but ventilation, cleaning equipment and early staff arrivals can gradually mask a soft tone as 6:00 am approaches. Placing the device nearby and choosing a signal distinct from those background noises makes it easier to recognise without setting a needlessly harsh volume.

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 5:16 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.