For much of the year the outdoors only becomes usable once the sun has gone, which is why running tracks and parks fill up at hours that would look strange elsewhere. If 9:04 pm is when you mean to be out, the countdown here gives the exact wait rather than a rough sense of soon.
One number, counting down: hours, minutes and seconds together. No button to press first, no options to get right, no settings screen hiding a default that turns out to be wrong. Whatever it says is the current distance to 9:04 pm, worked out fresh a second ago rather than when the page loaded.
Plenty of phones and dashboards default to a 24-hour display regardless of how people around them actually speak, so 21:04 may well be the figure staring back at you while 9:04 pm is what anyone would say out loud. Neither form is more correct; they are just aimed at different readers.
Common questions
What is 21:04 on a 12-hour clock?
The same instant is 9:04 pm in writing and four minutes past nine at night out loud. Anything from 13:00 onwards loses twelve to give the pm figure, which is the only sum involved in moving between the two.
Does the number update by itself?
Yes. It is recalculated every second from your device's clock, so nothing needs refreshing or restarting. Whatever is on screen is the current gap to 9:04 pm, not a figure worked out when the page first opened.
What happens once 9:04 pm has passed for today?
The count rolls over and carries on towards the same time tomorrow. That happens on its own at the moment the time passes — the page does not need reloading and there is nothing to reset by hand.
Which clock does the countdown use?
Your own. It reads the local time and time zone from the device in front of you, which in the Emirates means Gulf Standard Time, UTC+4. Travel and the count follows whatever the device picks up.