Bath, books, bed: the evening routine with younger children runs on a schedule that only works if it starts on time. Knowing exactly how long is left before 8:05 pm is genuinely more useful mid-routine than trying to read a clock with wet hands. The figure here updates on its own, second by second.
Coming back to this page in an hour, tomorrow or next month shows exactly the same thing: however long is genuinely left until 8:05 pm next comes round. There is no session to lose and nothing to configure again, because the number is worked out fresh each time from the clock on your device.
Twelve o'clock is where the 12-hour clock is at its weakest, since 12 am and 12 pm are read the wrong way round often enough to cause real trouble. Writing a time as 20:05 removes the problem outright, because a 24-hour figure only ever points at one moment in the day.
Common questions
What is 20:05 in the 12-hour clock?
That is 8:05 pm, or five past eight in the evening 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 8:05 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.
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.
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