How to use the online alarm clock
You have just woken at 1:16 am, with the Stonehenge solstice sunrise still ahead and the journey not yet begun. This alarm can mark the moment to get out of bed, check the weather and gather the layers waiting by the door. There are 44 minutes before 2:00 am, enough time to become properly alert and make the final preparations without turning the start into a rush.
Your Stonehenge departure depends on the alarm sounding before the computer slips into sleep. Set the time, check the volume and leave the browser running on a powered, awake machine. Closing the page or allowing the machine to sleep prevents the alarm from making a sound, so the sunrise plan could lose its cue. A phone alarm makes a sensible backup when the drive and entry arrangements leave little room for a missed start.
Once the solstice trip is under way, protect the sleep that remains after the visit by keeping the return simple. Pack water, a warm layer and anything needed for the road now, rather than searching for them at night. At 1:16 am, bright room lighting can make the whole household feel awake; use only enough light to dress and leave safely, then plan a quiet rest later in the morning.
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 1:16 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.
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