Set the alarm clock for 8:48 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 8:48 am alarm

  • Asleep by 11:33 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 1:03 am — 5 full sleep cycles, about 7 hours
  • Asleep by 2:33 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.

8:48 am across the country

London8:48 am
Birmingham8:48 am
Manchester8:48 am
Glasgow8:48 am
Belfast8:48 am

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

How to use the online alarm clock

Getting ready early for the school bus makes 8:48 am a useful checkpoint rather than a last-minute alarm. Bags, shoes and the child’s coat can be sorted while breakfast is cleared away, leaving a little breathing room before 9:00 am. The signal can mark the point for final checks: lunch packed, water bottle filled and bus pass safely in a pocket.

In a kitchen filled with conversation, running water or a radio, the alarm needs enough volume to stand out without startling everyone. A quick sound check from the room where the family will be waiting shows whether the chosen level carries over the background noise. The alarm cannot sound after the browser page is closed or the computer goes to sleep, so the school bus routine needs another backup if nobody will keep it active.

While the child is putting on a coat, a glance outside can prevent an uncomfortable wait at the stop. Early British mornings may feel damp even when rain is not falling, and still air can make mist or moisture linger around pavements and parked cars. Keeping a light waterproof layer near the school bag makes it easy to adjust before leaving, while a brief airing of the hallway can make the rush outdoors feel less stuffy.

Common questions

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.

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.