How to use the online alarm clock
Waiting for the right moment to leave for an NHS blood donation appointment makes 5:22 pm a time to watch rather than let drift past. An alarm can mark the point when preparations need to stop and the journey needs to begin, well before the clock reaches 6:00 pm.
Keeping other information open while you wait may send the alarm page into the background. Some browsers restrict sound or activity there, so a quick sound check after setting the alarm helps confirm that it remains audible. If the page is closed or the phone falls asleep, no alert can sound for your NHS blood donation departure; a separate phone alarm is a sensible backup when missing the appointment would disrupt the evening.
Late-afternoon light can leave a bright phone screen feeling harsh while the minutes are being watched. For the wait at 5:22 pm, lowering the screen brightness to match the room and placing the phone where the time is visible without constant close checking can reduce glare. The alarm then carries the responsibility for the final cue, while occasional glances remain enough.
Common questions
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.
What happens if my laptop goes to sleep before 5:22 pm?
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.
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