The pips on the hour have been marking time for the best part of a century, and plenty of people still set their watch by the one o'clock signal without thinking about it. This page does something narrower and more exact: it counts down to 12:40 pm on your own device's clock, right down to the second.
Rather than rounding to the nearest minute, the count tracks hours, minutes and seconds the whole way down, in one line. That precision matters most in the last stretch, when the minutes turn into single figures and the difference between leaving now and leaving shortly stops being academic and starts costing you the train.
Rail and bus timetables across Britain are printed in 24-hour time, which is why 12:40 is the version that matters when checking a departure against a board or a printed sheet. This page shows 12:40 pm for everyday reading and 12:40 alongside it, so the two can be matched without any mental arithmetic.
Common questions
Will this alert me when the time arrives?
No. It is a live number rather than an alarm — nothing rings, buzzes or notifies you at zero. If you need to be interrupted at 12:40 pm, set an alarm as well and treat this page as the running total.
Is it affected by the clocks changing?
Only in the sense that your device is. When the change between GMT and BST happens at the end of March and October, the device adjusts and the countdown follows it without anything to do here.
What is 12:40 in the 12-hour clock?
That is 12:40 pm, or twenty to one in the afternoon 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.
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