Set the alarm clock for 7:25 am

Leave this tab open — the alarm only rings while the tab stays open.

The alarm goes off in: ::

You can also try the other alarm clocks

Alarm clock for 7:23 am Alarm clock for 7:24 am Alarm clock for 7:26 am Alarm clock for 7:27 am

Going to bed for a 7:25 am alarm

Asleep by 10:10 pm — 6 full sleep cycles, about 9 hours
Asleep by 11:40 pm — 5 full sleep cycles, about 7 hours
Asleep by 1:10 am — 4 full sleep cycles, about 6 hours

A sleep cycle runs about 90 minutes, and most people take around 15 minutes to drop off. Waking at the end of a cycle feels easier than waking in the middle of one.

7:25 am across the country

Sydney	7:25 am
Brisbane	7:25 am
Adelaide	6:55 am
Perth	5:25 am
Darwin	6:55 am

Times are worked out live in your browser, so daylight saving is already accounted for.

Online alarm clock for 7:25 am

Halfway through checking heat load on a Darwin construction site, you need a clear cue to stop what you are doing at 7:25 am. Set this browser alarm for that time so you can finish the current reading without repeatedly checking your phone. The alert also leaves 35 minutes before 8:00 am for noting the result and moving to the next area.

While you continue the site check, keep the alarm page open and avoid pushing it behind several other apps for long periods. A browser may reduce activity on a page left in the background, which can affect when its alert is heard. Your construction-site heat-load check will miss its cue if you close the alarm page or let the phone sleep, because the browser alarm cannot sound in those conditions.

For an early Darwin check, take account of the outdoor air rather than treating 7:25 am as automatically cool. Humidity can already be noticeable, and conditions may change quickly once direct sunlight reaches the work area. Place your measuring equipment where the crew will actually be working, note whether the spot is shaded, and allow the sensor to settle before writing down the reading.

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.