How to use the online alarm clock
As you hand the solstice sunrise watch to the next person, set the alarm for 12:23 am so the Stonehenge plan stays on schedule. Tell them what the signal means before you settle down: it might mark a final kit check, a driver change or the moment to leave. With 1:00 am approaching, there is still time to confirm the meeting point and keep warm layers close.
Your Stonehenge handover depends on the alarm remaining able to run. Once the browser is closed, this solstice alarm cannot sound, and it may also fail if the computer or phone goes to sleep. Leave the page open, keep the machine awake and set its volume before passing responsibility across. A separate phone alarm is a sensible backup when missing the signal could delay the sunrise journey.
Anyone taking over at 12:23 am may be moving between a warm room and the cooler night outside. Strong air conditioning can make that contrast feel sharper, so place a jumper beside the kit instead of leaving it packed away. Keep the room comfortably cool rather than icy, and check the outside temperature before choosing what to wear for the wait near the stones.
Common questions
What happens if my laptop goes to sleep before 12:23 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.
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.
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