the time is 1,2,3,4,5,6

In american notation late tonight -- specifically, 123 seconds after 1:00 a.m. -- the time and date, for the first time in all of humanity, will be 01:02:03 04/05/06.
In Europe however, which renders the date before the month, this singular moment will occur next month, at 123 seconds past 1 a.m. on 4 May. And after that, it most definitely will never occur again.