From December to February the late afternoon is the pleasant part of the day rather than the part to be survived, and it is short. If 4:50 pm is when you mean to be out of the door, this page gives the exact time remaining rather than the guess that usually costs half of it.
There is nothing to start and nothing to choose. The page reads the clock on your device, works out the gap to 4:50 pm, and redraws it every second for as long as it is open. Leave it in a background tab if you like; the number will be current whenever you look back at it.
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 16:50 removes the problem entirely, because a 24-hour figure only ever points at one instant in the day.
Common questions
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.
Will it alert me when 4:50 pm arrives?
No. This is a live figure rather than an alarm — nothing sounds, vibrates or notifies at zero. If you need interrupting at 4:50 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 16:50 on a 12-hour clock?
The same instant is 4:50 pm in writing and ten to five in the evening 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.