How to use the online alarm clock
Pulling yourself away from a book or unfinished notes is the hard part when you need to leave the university library’s night reading room at 1:30 am. Set the alarm as the firm stopping point, leaving enough time to pack your laptop, return any books and collect your coat rather than drifting on until 2:00 am.
A quiet signal can disappear beneath ventilation, keyboard taps or audio playing through headphones while you study. Choose a clearly audible volume and test it from where you will actually be sitting, without disturbing other readers. Keeping the phone within sight adds a visual cue if the sound is masked. Because this browser alarm works only while its page remains open and the computer stays awake, it cannot prompt your departure from the reading room after either has been shut down.
Once the library doors close behind you at 1:30 am, the journey may take longer than its daytime version because buses and trains run less frequently overnight. Check the next departure before packing up and include the walk from the building to the stop or station. If the connection is sparse, treating the alarm as the start of the whole journey—not merely the end of studying—provides a practical margin for the route home.
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.
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