Online alarm clock for 12:39 am
You’re preparing ahead for a call to New Zealand, where the morning is already under way while Australia is still deep in the night. Setting the alarm for 12:39 am gives you a clear cue to check the number, find a quiet spot and be ready before 1:00 am arrives, without watching the clock between tasks.
Your New Zealand call may need either a gentle reminder or a signal that cuts through a silent room. Choose a softer tone if the phone is beside you and others are asleep; use a more persistent sound if you might be wearing headphones or finishing something elsewhere in the house. Check the volume now and leave enough time to recognise the alarm before dismissing it. Keep a separate phone alarm as backup, because this browser alarm may fall silent when it is no longer running, and the call could then be missed.
Before settling in to wait, consider the humid night air outside at 12:39 am. If you plan to take the call on a balcony or verandah, step out briefly first and check whether the air feels sticky, breezy or damp enough to affect your comfort and the microphone. Indoors, a nearby fan can create background noise, so position it away from the phone while keeping the room comfortable.
Common questions
Can I set more than one alarm at a time?
This page is built around a single alarm at a time. For multiple alarms, open a separate tab for each one and set a different time in each, keeping every tab open until it's rung.
Why use a browser alarm instead of my phone's built-in one?
Mainly for reliability against silent mode, do-not-disturb, or a phone left charging out of earshot. It's a useful backup or a desk-based alternative, though it depends on this tab staying open rather than running in the background of your phone.
Is there a cost to use this?
No, it's free, with no sign-up and no limit on how many times you set it. It just needs the tab left open until the time you've chosen arrives.
Will the alarm still ring if I close the browser tab?
No. The alarm only runs while this tab stays open — closing it, or closing the browser entirely, stops the countdown before it can ring. Keep the tab open in the background if you need it to go off later.
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