Online alarm clock for 2:21 am
You’re handing the security shift to the next guard at 2:21 am, with logs, keys and any overnight issues still to pass across. Setting the alarm for this exact time gives the handover a clear starting point rather than letting it drift towards 3:00 am. That leaves room to explain anything unusual on the site before you sign off and the other guard takes responsibility.
Your security handover depends on hearing the alert, so keep the browser page active and the sound turned up while you finish the shift notes. A browser alarm may not cover the security handover if the page is closed or the phone goes to sleep before 2:21 am. If you expect the handset to lock early, adjust its sleep setting temporarily or use a separate alarm as backup, then check that the volume is audible in the gatehouse or control room.
Once the relief guard has the keys, check the trip home before leaving the site. Roads may be quiet at this hour, but overnight works, lane closures and long detours can still change how long the drive takes. Allow a little extra time for a fuel stop or a slower section on an unlit road, and avoid assuming that an empty route will make every part of the journey quick.
Common questions
Do I need to create an account or download anything?
No, there's nothing to sign up for and nothing to install. Pick a time and a sound, press Start, and it runs entirely in this browser tab.
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.
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