In Ramadan the whole afternoon points at sunset, and the last hour before it is the slowest of the month. A live countdown to 2:24 pm at least turns that hour into a figure that moves rather than an open stretch of waiting. It reads your device's clock and updates without anything to press.
If 2:24 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.
In an office where a dozen nationalities read the same calendar invite, 24-hour notation quietly does a lot of work. 14:24 cannot be misread as the other end of the day, whereas 2:24 pm depends on the reader noticing two small letters at the end of it. Both describe exactly the same moment.
Common questions
What is 14:24 on a 12-hour clock?
The same instant is 2:24 pm in writing and twenty-four minutes past 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 2:24 pm, not a figure worked out when the page first opened.
What happens once 2:24 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.