Outdoor sport waits for the sun to drop for most of the year, which is why pitches and courts are booked at hours that look late on paper. If 5:25 pm is when you are due on, the useful number is the gap before you leave. This page counts that down precisely, updating every second.
There is nothing to start and nothing to choose. The page reads the clock on your device, works out the gap to 5:25 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 17:25 removes the problem entirely, because a 24-hour figure only ever points at one instant in the day.
Common questions
What is 17:25 on a 12-hour clock?
The same instant is 5:25 pm in writing and twenty-five past 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.
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 5:25 pm, not a figure worked out when the page first opened.
What happens once 5:25 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.