The hour after the flat finally goes quiet is the one most people would keep if they could, and it is also the one that vanishes without being noticed. Giving it an end at 10:23 pm and watching the figure fall is a fairer account of it than looking up later and doing the subtraction.
The count runs entirely inside the browser, which is why it needs no account, no permission and no connection once the page has loaded. It also means the figure belongs to this tab: close the page and it stops, and opening it again starts the calculation from scratch rather than resuming.
India runs half an hour off the round numbers, thirty minutes ahead of the Emirates, which catches out anyone arranging a call by counting whole hours. Since the clocks here never shift, the offset to Mumbai is fixed all year — it is the European and American ones that move underneath you.
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 22:23 on a 12-hour clock?
The same instant is 10:23 pm in writing and twenty-three minutes past ten 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 10:23 pm, not a figure worked out when the page first opened.
What happens once 10:23 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.