Commuting means living by a printed timetable, whether that is the 8:12 to Waterloo or whatever the equivalent is at your own station. Missing it by ninety seconds costs the same as missing it by ten minutes. This page tracks the exact time left until 9:28 am, so the walk to the platform can be judged properly.
There is one number to read and nothing to choose: hours, minutes and seconds counting down together towards 9:28 am. No start button, no options, no settings page to get right beforehand — just the current gap to that time, updating on its own for as long as you need it.
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 09:28 removes the problem outright, because a 24-hour figure only ever points at one moment in the day.
Common questions
What is 09:28 in the 12-hour clock?
That is 9:28 am, or twenty-eight minutes past nine in the morning 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 9:28 am 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.