How to use the online alarm clock
You are watching the clock for the moment to close the henhouse against urban foxes, and an alarm for 11:49 pm lets you wait without checking every minute. It leaves enough time to secure the door and latch before 12:00 am, when the garden is likely to be quiet and the birds settled.
Because a quiet chime could disappear into late-evening household noise, the chosen tone should match where you are waiting. A softer sound suits a silent room with the phone nearby; a persistent tone makes more sense if the television is on or you are upstairs. The volume and sound can be checked beforehand. This browser alarm cannot continue after you leave the page or allow the phone to sleep, so it may not alert you and the henhouse could remain unsecured.
While waiting to shut the birds in, a small drink is less distracting than preparing anything elaborate so close to midnight. Water or a cup of decaffeinated tea can be kept nearby, but a full meal is easier to leave until the latch has been checked. Keeping the snack simple also means fewer lights, plates and kitchen noises competing with the alarm at 11:49 pm.
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.