Set the alarm clock for 6:39 pm

 

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

The alarm goes off in: ::
 
 

6:39 pm across the country

London6:39 pm
Birmingham6:39 pm
Manchester6:39 pm
Glasgow6:39 pm
Belfast6:39 pm

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

How to use the online alarm clock

Waking at 6:39 pm leaves little room for drifting back to sleep if you need to reach the chemist before its early closing time. Set the alarm for the moment you must get up, then use the time before 7:00 pm to get dressed, check the opening hours and gather any prescription paperwork or identification you need.

Because your phone may be on silent after an afternoon sleep, check that browser audio is permitted and turn the volume up enough to hear the alert from across the room. A quick sound check can prevent a missed warning without changing your usual notification settings. Keep the alarm page active and the phone awake; otherwise the alert for your chemist trip may not sound, leaving less time to get there before closing.

With another commitment later this evening, decide how much spare time you need after the chemist and work backwards from that point. Allow a few extra minutes for a bus delay, a queue at the counter or finding the prescription. At this hour, that small buffer protects the rest of the day without making the first alarm unnecessarily early.

Common questions

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 6:39 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.