Anything due by the end of the morning produces one short burst of urgency just before it lands. Knowing exactly how long is left until 1:51 pm is the difference between finishing properly and rewriting the last paragraph in a hurry. The count here recalculates every second, so it is never out of date.
Nothing here is stored, sent or remembered. The page works out one number from your device's clock and draws it, and that is the whole of what it does. Closing the tab leaves nothing behind, and there is no history of times you have looked up sitting anywhere afterwards.
Airport boards, metro timetables and prayer time tables are all printed in 24-hour form, which is why 13:51 is the version that matters when checking something against a screen or a printed sheet. This page shows 1:51 pm for everyday reading and 13:51 beside it, so the two never need converting in your head.
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 13:51 on a 12-hour clock?
The same instant is 1:51 pm in writing and nine minutes to two in the afternoon 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 1:51 pm, not a figure worked out when the page first opened.
What happens once 1:51 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.