How to use the online alarm clock
While preparing ahead for the office evacuation drill, set the alarm for 11:55 am so the reminder arrives before everyone needs to move. That leaves a brief window to check the assembly point, put down anything awkward to carry and be ready before 12:00 pm. A calm prompt at the chosen time can prevent the exercise beginning with a scramble for coats, passes or instructions.
Because this reminder is tied to the evacuation drill, keep the browser running until it sounds. If the page or browser is closed, the office alarm cannot alert you; it may also remain silent if the computer or phone has gone to sleep. Leave the page open, keep the machine awake and set the volume high enough to hear from your desk. Where workplace rules permit, a separate phone alarm provides sensible backup for something that must happen on time.
As the morning gives way to midday, overhead office lighting and a bright screen can make small on-screen details less comfortable to follow. After setting 11:55 am, lower excessive screen brightness to suit the room, enlarge any drill notes you need, and place them where they can be read without staring at the display. Then look away from the screen while waiting and keep the route or assembly-point details available on paper.
Common questions
What happens if my laptop goes to sleep before 11:55 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.