How to use the online alarm clock
Waking at 4:07 pm gives you a clear cue to get up before the gas engineer arrives to check the boiler. Set the alarm for this exact time, then use the period before 5:00 pm to get dressed, find any service paperwork and make sure the engineer can reach the boiler without boxes or laundry blocking the way.
While you prepare for the boiler visit, leaving this page behind another tab should still keep the alarm available, although some browsers may restrict an inactive page after a while. Keep the browser running and return here once to check that the alarm remains set and the sound is audible. A boiler appointment could be missed if the browser has been closed or the computer has fallen asleep, because this alarm cannot sound in those conditions.
Your late-afternoon preparations may affect other people in the house, particularly if someone is working, resting or collecting children from school. Tell them when the gas engineer is expected and which rooms may need to stay accessible. At 4:07 pm, use a moderate alarm volume if others are nearby, then keep your phone or another dependable alert with you as a backup while you clear the route and listen for the door.
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 4:07 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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