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 10:38 pm removes the comfortable margin people invent for themselves at this hour, and it keeps removing it every second the page stays open.
This is a display rather than an alarm. Nothing rings, buzzes or notifies at the end, and the page will not interrupt whatever else you are doing. If being interrupted is the point, set an alarm as well and treat this page as the running total you can glance at in the meantime.
Twelve o'clock is where the 12-hour clock is weakest: 12 am and 12 pm are read the wrong way round often enough to cause real trouble with bookings and deadlines. Writing the same moment as 22:38 removes the problem entirely, because a 24-hour figure only ever points at one instant in the day.
Common questions
Will it alert me when 10:38 pm arrives?
No. This is a live figure rather than an alarm — nothing sounds, vibrates or notifies at zero. If you need interrupting at 10:38 pm, set an alarm alongside it and use this page as the running total.
Do the clocks change here?
No. The UAE has no daylight saving at all, so the offset stays at UTC+4 in every month. When the gap to Europe or North America shifts, it is their clocks that moved, not yours.
What is 22:38 on a 12-hour clock?
The same instant is 10:38 pm in writing and twenty-two minutes to eleven 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 10:38 pm, not a figure worked out when the page first opened.