The fast breaks at sunset, and sunset shifts by a minute or so each day, so the time that applied last week is not the time tonight. If 7:47 pm is this evening's figure, this page counts down to it exactly — hours, minutes and seconds — which is what everyone in the kitchen actually wants to know.
If 7:47 pm 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.
Having all three forms in front of you saves a good deal of squinting: 7:47 pm for everyday reading, 19:47 for anything printed in timetable style, and thirteen minutes to eight in the evening for whatever was actually said down the phone. They are three ways of writing one instant, and mixing them up is easier than it sounds.
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 19:47 on a 12-hour clock?
The same instant is 7:47 pm in writing and thirteen minutes to eight in the evening 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 7:47 pm, not a figure worked out when the page first opened.
What happens once 7:47 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.