Online alarm clock for 12:13 am
You’re preparing the security shift handover early, checking the site keys, radio and notes while there is still room to fix anything missing. An alarm for 12:13 am gives the outgoing officer a clear cue to begin the final checks without rushing the incoming officer. That leaves 47 minutes before 1:00 am for a careful briefing and any follow-up at the gate.
Before relying on the 12:13 am signal, run a quick test while you are still organising the handover. Set a nearby time, raise the volume and confirm that the sound is easy to recognise over radios, ventilation or overnight work. Closing the browser page or letting the phone sleep can silence the alarm, leaving the security shift without its planned handover cue, so keep another alarm available for this duty.
While you finish the night paperwork, choose something light and tidy enough to eat in the crib room without delaying the briefing. Water or a warm drink can sit beside the notes, but a full meal is easier to leave until the handover is complete. Keep lids secure near radios and keys, and allow a moment before 12:13 am to put cups and wrappers away.
Common questions
Can I change the alarm sound?
Yes, there's a short list of tones to choose from before you press Start. Pick whichever one you're most likely to actually hear — softer sounds are easier to sleep through than a firm chime or bell.
What happens once the alarm goes off?
It rings through your device's speakers on a loop until you stop it from this page. There's no separate app notification, so make sure your volume is turned up before you rely on it.
Is this alarm accurate across daylight saving time?
It uses your device's local clock, so as long as your computer's time and date settings are correct, it'll adjust automatically when daylight saving time starts or ends.
Can I use this on my phone instead of a laptop?
Yes, it works in a mobile browser the same way, but phones are more likely to lock the screen or sleep, which can stop the alarm from ringing. A laptop or desktop tends to be more reliable for this.
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