From November to March the morning is the part of the day worth being outside for, and the window closes earlier than newcomers expect. If 6:21 am is when you mean to be at the beach or on the track, the countdown here gives the exact figure, updating every second for as long as the page is open.
If 6:21 am has already gone today, the count simply carries on towards tomorrow's occurrence. That rollover happens by itself at the moment the time passes, with nothing to reset and no need to reload, so a page left open overnight is still showing something useful in the morning.
The Emirates keep Gulf Standard Time, UTC+4, and never move the clocks. Everything about time here follows from that: 6:21 am in January is the same 6:21 am in July, and the gap to London or Berlin changes twice a year because of what they do, not because of anything happening at this end.
Common questions
Do the clocks change here?
No. The UAE has no daylight saving at all, so the offset stays at UTC+4 in every month. When the gap to Europe or North America shifts, it is their clocks that moved, not yours.
What is 06:21 on a 12-hour clock?
The same instant is 6:21 am in writing and twenty-one minutes past six in the morning 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 6:21 am, not a figure worked out when the page first opened.
What happens once 6:21 am 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.