By this stage the kettle has usually been on once already and the radio is halfway through the morning news, which is precisely when nobody is watching the clock. A live count to 10:48 am does that watching for you, updating continuously so the number in front of you is always the current one.
When the clock reaches 10:48 am, the count does not sit at zero. It rolls straight over and begins again towards the same time tomorrow, on its own, without a refresh or a reset. That makes this a page worth keeping in a bookmarks bar rather than one you look at once and forget.
Plenty of phones, laptops and dashboards default to a 24-hour display regardless of how people around here actually talk, so 10:48 may well be the figure staring back at you even though 10:48 am is how the same moment would be said aloud. Neither is more correct than the other.
Common questions
What is 10:48 in the 12-hour clock?
That is 10:48 am, or twelve minutes to eleven in the morning 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 10:48 am 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.
Which clock does it use?
Your own. It reads the local time and time zone from the device you are looking at, so the figure reflects where you actually are rather than a fixed zone written into the page.