Lunch is the hinge the working day turns on, and the last half hour before it always drags. If 12:47 pm is when the break genuinely starts, a live countdown makes that stretch easier to pace than repeatedly glancing at the corner of a screen. The number here updates every second on its own.
Because the count reads straight from your device's clock, its accuracy rests on that clock being right, time zone included. Phones and computers normally handle this themselves, so in practice the figure here lines up with whatever time the device is already showing elsewhere on screen.
Plenty of phones, laptops and dashboards default to a 24-hour display regardless of how people around here actually talk, so 12:47 may well be the figure staring back at you even though 12:47 pm is how the same moment would be said aloud. Neither is more correct than the other.
Common questions
Is it affected by the clocks changing?
Only in the sense that your device is. When the change between GMT and BST happens at the end of March and October, the device adjusts and the countdown follows it without anything to do here.
What is 12:47 in the 12-hour clock?
That is 12:47 pm, or thirteen minutes to one in the afternoon if you are saying it aloud. From 13:00 onwards, subtracting twelve gives the pm figure — the same moment written three different ways.
Does the number update by itself?
Yes. It recalculates every second from your device's clock, so there is nothing to refresh or restart. Whatever is on screen is the current gap to the target time, not a figure worked out when the page first loaded.
What happens if 12:47 pm has already gone for today?
The count simply carries on towards the next occurrence, which is tomorrow. That rollover happens on its own — the page does not need reloading and there is nothing to reset by hand.