How to use the online alarm clock
You have only just woken at 6:13 pm, and getting to your NHS blood donation appointment now means switching from sleep to leaving mode without drifting. Check the appointment details, get dressed, gather any requested paperwork and allow enough travel time. With 7:00 pm approaching, keep the next steps simple and visible rather than relying on a hazy mental list.
Set the alarm for the point when preparation must stop and you need to leave. Keep this page open while it is running and make sure the sound is audible. If you close the page or browser, the NHS blood donation alarm will not sound, which could leave you without the reminder that protects your departure time. A separate phone alarm is sensible if you expect to move away from the screen or let the computer sleep.
Because you have woken in the late afternoon, the surrounding noise may change quickly as commuters return, neighbours arrive home and evening traffic builds towards 7:00 pm. Put keys, paperwork and anything else you need beside the door before those sounds become distracting. If your room is already noisy, raise the volume now and test that the alert can be heard from where you are getting ready.
Common questions
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.
Does the alarm still work if I close the tab?
No. Everything runs inside this page, so closing the tab — or quitting the browser altogether — ends the countdown there and then. Leaving it open in the background is all it asks, and switching to another tab makes no difference.
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