Deciding to be asleep by a set time and actually managing it are two different problems, but the first is easier with a real number attached to it. A precise count to 10:22 pm removes the comfortable margin people invent for themselves at this hour, and it keeps removing it every second the page stays open.
If 10:22 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.
Airport boards, metro timetables and prayer time tables are all printed in 24-hour form, which is why 22:22 is the version that matters when checking something against a screen or a printed sheet. This page shows 10:22 pm for everyday reading and 22:22 beside it, so the two never need converting in your head.
Common questions
What is 22:22 on a 12-hour clock?
The same instant is 10:22 pm in writing and twenty-two 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 10:22 pm, not a figure worked out when the page first opened.
What happens once 10:22 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.
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