The Tube at this hour is a matter of joining the right crowd rather than choosing a seat, and getting through it depends on leaving at a specific minute. This page counts down to 6:04 am precisely — the moment to leave, the moment to touch in, or the moment a meeting on the other side begins.
There is one number to read and nothing to choose: hours, minutes and seconds counting down together towards 6:04 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.
Matching what somebody said against what somebody wrote is easier with all three versions to hand: 6:04 am for everyday reading, 06:04 for anything printed in railway style, and four minutes past six in the morning for whatever was actually spoken down the phone. All three describe precisely the same point in the day, and having them side by side saves a good deal of squinting at a timetable.
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 6:04 am, 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 06:04 in the 12-hour clock?
That is 6:04 am, or four minutes past six 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.