How to use the online alarm clock
Before handing your duties to the next person, you can leave a 4:57 pm alarm as the cue to head off for your NHS blood donation appointment. It lands just three minutes before 5:00 pm, which makes the time easy to recognise during a late-afternoon handover without treating the round hour as the actual deadline.
A quiet chime may suit a shared workplace where someone else is taking over, while a more insistent tone is less likely to disappear beneath conversation, keyboards or packing up. The chosen sound should be noticeable without startling everyone nearby. This browser alarm remains dependable only while the browser is active and the phone stays awake, so the NHS blood donation reminder may not sound after you leave the page or let the handset sleep.
Once the handover is finished, the remaining afternoon can still contain another commitment, a journey home or an errand. Allowing a small buffer after the appointment means a delay need not press directly against the next thing in the diary. Keeping travel details and anything needed later together also makes it easier to judge whether that same-day plan has enough breathing room.
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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