Four years and 86 days ago, Trafalgar Square played host to scenes of stunning celebration and a party to rival any thrown by Corey "Myspace" Delaney.
It was July 2005 and London had been awarded the 2012 Olympic Games following a keenly fought contest against the likes of Paris and Madrid, and the start of a potentially legacy-building process began.
Well today is the turn of either Chicago, Madrid, Rio de Janeiro or Tokyo.
An International Olympic Committee ceremony in Copenhagen, due to conclude some time after 1730 BST, will select the hosts of the 2016 Olympic Games and it has come down to that quartet. Bed down now for a day of twists, turns, votes and vol-au-vents as I bring you all the gossip and news from Denmark, where experts have already been describing this as the closest bid process in history. It could be a bumpy ride.
A quick breakdown of today's timetable, then. Well, the Chicago bid team has already made their 45-minute presentation (followed by a 15-minute question-and-answer session) to the IOC members and are meeting the media as we speak - more on that in a bit - with Tokyo up at 0930, Rio de Janeiro at 1110 and Madrid last up at 1350. Following this there will be an IOC Evaluation Committee report, voting, and then the announcement ceremony from about 1730.
We have reporters in Copenhagen and eyes and ears around all the teams and voters - what we don't have yet is you lot. I want you to get involved via text on 81111 or over on 606 and lend me your thoughts.
Do it - and do it well - and I can make you web famous for 15 minutes. It's almost too much power for one man alone to hold some might say, but there you go.