Deciding to finally put the phone down and go to sleep is easier with an actual number attached to it, and a countdown to 10:04 pm gives exactly that instead of an open-ended sense of soon. This page updates continuously, so the figure shown always reflects precisely where the night currently stands.
The countdown itself makes no sound and needs no attention while it runs — it is a number, not an alarm, and there is nothing set to go off when it reaches zero. Leaving the page open in the background is perfectly fine; it will simply keep counting down to 10:04 pm whether or not you are watching it.
Writing 10:04 pm keeps the am or pm attached to the number, which is handy for everyday reading but easy to misread on a tired scroll through a long list. Writing it instead as 22:04 removes that ambiguity outright, since a 24-hour figure like this only ever points to one moment in the day, never two.
Common questions
Why does the countdown look different on two devices checked at once?
That usually means the two clocks are not perfectly in sync, or one device has not adjusted for a time zone or daylight saving change. The countdown itself always follows whatever clock it is reading from.
Is there a way to make the countdown count towards a different time?
This particular page is fixed to one target time. Checking a different one just means visiting the matching page built for that specific time instead.
Can this replace an alarm for waking up or getting somewhere on time?
It shows exactly how long is left, but it does not ring or alert you at zero, so it works better alongside an alarm than as a replacement for one.
Does this countdown update automatically?
Yes. The numbers recalculate every second on their own, using your device's clock, so there is nothing to refresh or restart — the figure shown is always the current, exact gap to the target time.