How to use the online alarm clock
You are finishing for the night and heading out to move the car from the daytime restricted zone. Set the alarm for 10:03 pm so the task does not slip while you put things away, collect the keys or check where you parked. That leaves enough time to relocate the car before 11:00 pm without making the whole evening revolve around watching the clock.
While you finish up, this alarm page can stay behind another tab and continue counting down. Keep the browser running, leave sound permitted and avoid clearing the page before 10:03 pm. If the browser is closed or the phone or computer falls asleep, the alarm cannot alert you, which could leave the car in the restricted zone longer than planned. A background tab is therefore suitable only when the browser remains active; checking the volume once is more useful than repeatedly returning to the countdown.
Moving the car late in the evening may mean shifting between a bright screen and a dim street. Reduce the display brightness before leaving, use a warmer colour setting if your phone offers one, and have the route or parking details ready so you are not studying the screen beside the road. At 10:03 pm, a brief glance should be enough to confirm what you need and put the phone away.
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 10:03 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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