How to use the online alarm clock
Preparing the night before for a solstice sunrise at Stonehenge makes a 2:01 am alarm a useful checkpoint rather than a last-minute surprise. Clothes, water, tickets and the route can already be sorted, leaving the alarm to mark when it is time to get up and check the journey. That still allows a measured start before 3:00 am, without turning the departure into a scramble.
Because this alarm runs in the browser, closing the page or letting the phone or laptop go to sleep means it may not sound for the Stonehenge departure. Keep the browser open and the device awake, with enough charge or a power connection to last until 2:01 am. Set the volume before settling down, then confirm that silent mode, headphones or another audio output will not send the alert somewhere it cannot be heard.
Anyone leaving for Stonehenge during a warm spell may step from an air-conditioned room or car into noticeably different night air. Keep a light layer within reach, as the open landscape can feel cool even after a hot day, and avoid setting the air conditioning so low that getting dressed becomes uncomfortable. At 2:01 am, placing water beside the packed belongings also makes it less likely to be forgotten during the quiet early departure.
Common questions
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.
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.