How to use the online alarm clock
Preparing in advance for security before a ferry from Dover makes an 8:46 am alarm a useful checkpoint, rather than a last-minute warning. Set it while checking that passports, tickets and vehicle details are within reach. When it sounds, there are 14 minutes until 9:00 am: enough time to gather everyone, check the cabin and move towards the departure point without rushing.
Before relying on the alarm for the Dover crossing, check whether the phone is set to silent and confirm that browser audio can still be heard. Raise the volume to a level that will cut through conversation or luggage being moved, then use a short test alarm if there is any doubt. A browser alarm cannot safeguard the ferry schedule if the page stops running or the phone goes to sleep, so keep the page active and the phone awake until 8:46 am.
An early Dover departure can leave little sleep on either side of this moment, particularly after packing or driving through the night. If another person can take over preparations, decide that before settling down and set a separate wake-up alarm for them. Keep the remaining rest simple: place travel documents beside the bag, dim the screen, and avoid repeatedly checking the clock. That preserves the sleep still available before 8:46 am while leaving fewer tasks for the morning.
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 8:46 am?
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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