For most countries in Europe, the transfer deadline pops up on Monday. The deadline usually falls on the final day of August, but for the second year in a row, that day was on a weekend, while games were being played. For that reason, the transfer window stretches into September, and will close at 11 p.m. BST, 6 p.m. ET in most countries, including England.
The window closes at different times in some other countries, however. Because the Germans generally like to get their business done in a more efficient fashion than everyone else, their window closes early. Bundesliga teams can no longer sign players after 6 p.m. local time, 12 p.m. ET. Italy's window shuts at 11 p.m. local time, 5 p.m. ET, while the windows shut in England, France and Spain one hour later. Some countries -- like Russia -- keep their transfer windows open beyond Monday.
In this space, we'll be updating everything that happens up until the deadline, and likely for another hour or two after it closes, as we learn whether or not rumored last-minute deals actually end up going through.
The biggest done deals | Complete done deals StoryStream here
Radamel Falcao goes to Man United on a loan to buy | Full story from SB Nation
Daley Blind has signed for Manchester United | Full story from SB Nation
Arsenal sign Danny Welbeck | Full story from SB Nation
Valencia have signed Alvaro Negredo | Full story from SB Nation
Chicharito loaned to Real Madrid | Full story from SB Nation
Shinji Kagawa going back to Borussia Dortmund | Full story from SB Nation
Atléti get better with Italian international Cerci | Full story from SB Nation
Benjamin Stambouli joins Spurs | Full story from SB Nation
Live tracker (times are BST; ET is -5 hours)
12:29 a.m. - Jermain Defoe leaving MLS to go back to the Premier League? TFC are negotiating with QPR.
1:18 a.m. - Fiorentina continue to chase Micah Richards, and will make one last move for him.
1:23 a.m. - Tottenham Hotspur would like to do a swap deal with Andros Townsend and Jay Rodriguez
8:57 a.m. - HSV are going to sign Lewis Holtby on loan from Tottenham Hotspur.
9:10 a.m. - Manchester City could offload Matija Nastasic, with Arsenal and Spurs both interested.
9:14 a.m. - With Sergio Romero rumors stalling, Liverpool are also interested in former Barcelona man Victor Valdes.
9:46 a.m. - Monaco could target Roberto Soldado as a replacement for Radamel Falcao.
10:08 a.m. - The entire Premier League mid-table is interested in Marseille attacker Andre Ayew.
10:29 a.m. - Radamel Falcao is heading to Manchester United on loan.
10:45 a.m. - 'Chicharito' Javier Hernandez is undergoing a medical at Real Madrid.
10:49 a.m. - Ron Vlaar's agent says that his client won't leave Aston Villa, despite Arsenal's interest.
11:21 a.m. - Crystal Palace are going to make Wigan's James MacArthur their record signing.
12:33 p.m. - Jonathan Biabiany is on his way to AC Milan, with Christian Zaccardo going the other way to Parma.
12:51 p.m. - Burnley have signed George Boyd.
12:55 p.m. - Roma are trying to sign Mapou Yanga-Mbiwa from Newcastle.
12:56 p.m. - Inter Milan have been linked to a massive €25m bid for Florian Thauvin.
1:05 p.m. - Spurs are rumored to have made an offer for Jay Rodriguez that values him at £26m.
1:22 p.m. - Real Madrid announce the signing of Chicharito on loan.
1:30 p.m. - Valencia are in negotiations to sign Fredy Guarin from Inter.
1:52 p.m. - Alvaro Negredo loan to Valencia would include an obligation to buy him from Manchester City.
2 p.m. - Sebastian Coates looks likely to move on loan from Liverpool to Sunderland.
2:05 p.m. - Hull City look set to sign Mohamed Diame from West Ham.
2:19 p.m. - Bizarrely, Southampton have terminated Saphir Taider's loan after just 21 days.
2:46 p.m. - Manchester City could offload Scott Sinclair to Stoke.
3 p.m. - Aston Villa are weighing up a shock bid for Sergio Canales.
3:01 p.m. - Brazilian starlet Doria is in Marseille ahead of a likely move.
3:21 p.m. - Sandro is having a medical at QPR ahead of a £10m move from Tottenham Hotspur.
3:46 p.m. - Manchester United could pick up Joao Moutinho from Monaco.
3:55 p.m. - QPR have a bid accepted for Liverpool's Fabio Borini.
4:09 p.m. - Burnley have signed Nathaniel Chalobah on loan from Chelsea.
4:10 p.m. - Palermo striker Abel Hernandez has moved to Hull City for a potential £9.5m.
4:29 p.m. - Morgan Amalfitano likely to move to West Ham.
4:51 p.m. - Alessio Cerci officially signs for Atletico Madrid.
5:15 p.m. - Southampton are close to signing both Toby Alderweireld and Sadio Mane.
5:22 p.m. - HSV announce the signing of Lewis Holtby on loan.
5:29 p.m. - Benjamin Stambouli officially signs for Tottenham Hotspur.
5:49 p.m. - Arsenal have had a late bid for Marco Reus rejected.
6 p.m. - Falcao's loan will cost Manchester United £24m.
6:23 p.m. - Danny Welbeck is reportedly having a medical at Arsenal.
6:38 p.m. - Sebastian Coates' loan move to Sunderland is official.
6:51 p.m. - Danny Welbeck wants a permanent move, not a loan.
7:09 p.m. - Hull have signed Mohamed Diame from West Ham United.
7:11 p.m. - Arsenal have had a bid for William Carvalho rejected.
7:16 p.m. - Fabio Borini wants a much bigger wage than QPR are offering.
7:21 p.m. - Sunderland have locked up Ricky Alvarez on a one-year loan deal.
7:37 p.m. - Arsenal deny that Danny Welbeck is having a medical with them. This story.
7:41 p.m. - Daley Blind's move to Manchester United is now official.
7:53 p.m. - PSV have signed Nicolas Isimat.
8:15 p.m. - Jermain Defoe probably isn't leaving Toronto FC.
8:22 p.m. - Tom Cleverley looks likely to leave United, but Villa can't pay his wages.
8:24 p.m. - Negredo to Valencia seems even more likely.
8:46 p.m. - Hull close to a surprise swoop for Hatem Ben Arfa
9 p.m. - Aston Villa won't be signing Tom Cleverley. It's dead, but Everton are still interested.
9:08 p.m. - The Welbeck saga continues. A permanent move to Arsenal is possible.
9:24 p.m. - And now it looks like Arsenal have agreed to a £16m fee for Welbeck.
9:26 p.m. - Arsenal are busy. They've let two kids go.
10:12 p.m. - AS Roma have announced the capture of Mapou Yanga-Mbiwa.
10:13 p.m. - Micah Richards has joined Fiorentina.
10:13 p.m. - Tottenham Hotspur have sold Sandro to QPR.
10:18 p.m. - Aston Villa sell Karim El-Ahmadi back to Feyenoord.
10:25 p.m. - James McArthur has joined Crystal Palace, and he's their record signing.
10:26 p.m. - Southampton have loaned Gaston Ramirez to Hull.
10:26 p.m. - Oussama Assaidi has gone on loan to Stoke again.
10:52 p.m. - Marseille have signed Doria from Botafogo.
10:58 p.m. - Arsenal have applied for and received an extension to complete the Danny Welbeck deal.
11 p.m. - The transfer window is shut. More deals will be confirmed after the deadline.
11:03 p.m. - Valencia have signed Alvaro Negredo, and are obligated to buy him next year.
11:14 p.m. - Morgan Amalfitano has moved to West Ham.
11:17 p.m. - Crystal Palace have added some striker depth, signing Kevin Doyle on loan.
11:29 p.m. - Southampton announce Toby Alderweireld signing.
11:32 p.m. - Harry and Niko, together again.
11:53 p.m. - Sadio Mane has joined Southampton.
12:49 a.m. - Hull finally confirm the signing of Hatem Ben Arfa on loan.
12:58 a.m. - Arsenal have signed Danny Welbeck.
1:32 a.m. - Radamel Falcao has signed for Manchester United. Good night, folks.