13 June 2012: West Ham United sign goalkeeper Jussi Jääskeläinen on a free transfer to join the club when his contract at Bolton Wanderers expires.[3]
20 June 2012: West Ham United announce the signing of midfielder Mohamed Diamé to join the club after the expiration of his contract at Wigan Athletic.[4]
21 June 2012: After nearly six years with the club, goalkeeper Robert Green fails to agree a new contract and moves to Queens Park Rangers on a free transfer.[5]
1 July 2012: West Ham United announce the signing of George McCartney from Sunderland after a successful loan stint at West Ham during the 2011–12 promotion winning season. West Ham also announce the departure of Marek Štěch by mutual consent.[6]
18 July 2012: The club announce the signing of forward Modibo Maïga for an undisclosed fee from French club Sochaux.[7]
23 July 2012: The signing of young Swiss goalkeeper Raphael Spiegel from Grasshoppers for an undisclosed fee is announced.[8]
1 August 2012: The club announces the return of experienced defender James Collins on a four-year deal for an undisclosed fee from Aston Villa.[9]
10 August 2012: The transfer of French midfielder Alou Diarra from Marseille on a three-year contract for an undisclosed fee is confirmed.[10]
18 August 2012: West Ham kick the season off with a 1–0 home win against Aston Villa. James Collins, Jussi Jääskeläinen, Mohamed Diamé and Modibo Maïga all make their competitive debuts.[11]
24 August 2012: The club announces the signing of winger Matt Jarvis from Wolverhampton Wanderers on a five-year contract, with the option for an additional year, for a transfer fee which was a club record but was officially undisclosed.[12]
25 August 2012: West Ham travel to Swansea City for their first away match of the season and are comfortably beaten 3–0.[13]
30 August 2012: Liverpoolstriker, Andy Carroll signs on a season-long loan with the option to complete a permanent deal for an undisclosed fee in the summer of 2013.[14]
31 August 2012: Yossi Benayoun signs on-loan from Chelsea for the season, becoming their 11th signing of the transfer window.[15][16]
1 September 2012: West Ham bounce back from defeat by Swansea by beating Fulham 3–0 at home.[17]
12 September 2012: West Ham's oldest surviving player, Jimmy Andrews, dies aged 85.[18]
15 September 2012: West Ham earn their first away points of the season in a 0–0 draw with Norwich City.[19]
22 September 2012: West Ham's 100% home record is ended by a 1–1 draw with Sunderland.[20]
25 September 2012: Just over a year after being diagnosed with testicular cancer, striker Dylan Tombides makes his debut for West Ham in a 4–1 home defeat by Wigan in the League Cup[21]
1 October 2012: Eight players receive a yellow card, a Premier League record, as West Ham record their first away win of the season, a 2–1 win at QPR with goals by Matt Jarvis, his first for the club, and Ricardo Vaz Tê.[22]
6 October 2012: The Hammers lose against London rivals Arsenal 3–1 at home. Mohamed Diamé scores his first goal for the club.[23]
20 October 2012: Fellow promotees Southampton are comfortably beaten 4–1 at Upton Park.[24]
27 October 2012: West Ham lose their second away game of the season 2–1 against Wigan.[25]
3 November 2012: The current Premier League champions Manchester City are held to a 0–0 draw by West Ham.[26]
11 November 2012: West Ham win outside London for the first time this season with a 1–0 away win at Newcastle United. It is also their first win away to Newcastle since 1998.[27]
19 November 2012: The Hammers extend their unbeaten run to three games with a 1–1 draw against Stoke City.[28]
25 November 2012: West Ham are beaten 3–1 by London rivals Tottenham Hotspur. Andy Carroll scores his first goal for the club.[29]
1 December 2012: West Ham announce that on loan striker Andy Carroll has been ruled out for up to eight weeks due to a knee injury. Later that day, the Hammers complete an emphatic victory against London rivals Chelsea, winning 3–1.[31]
5 December 2012: West Ham are named preferred tenants for the Olympic Stadium.[32]
9 December 2012: West Ham lose 2–3 at home to Liverpool after leading 2–1 at half time. Mohamed Diamé tears his hamstring in the match.[33]
19 December 2012: The Boxing Day clash away at Arsenal is called off due to industrial action on the London Underground.[35]
22 December 2012: Carlton Cole picks up West Ham's first red card of the season in a 2–1 defeat by Everton.[36]
27 December 2012: The FA overturns Cole's red card he picked up against Everton after a successful appeal.[37]
29 December 2012: West Ham are beaten 1–0 by fellow promotees Reading.[38]
1 January 2013: The Hammers start 2013 with a home win against Norwich, 2–1. Joey O'Brien celebrates his 50th appearance for the club with a goal.[39]
5 January 2013 Recently signed from Liverpool, Joe Cole provides the assists for both goals, scored by James Collins, in a 2–2 home draw with Manchester United in the FA Cup third round.[40]
9 January 2013: West Ham co-chairman David Gold is admitted to hospital suffering from pneumonia.[41]
12 January 2013: West Ham lose for the first time in 2013 after being beaten 3–0 by Sunderland at the Stadium of Light.[42]
16 January 2013: A 1–0 defeat by Manchester United at Old Trafford sees West Ham exit the FA Cup in the third round.[43]
19 January 2013: Joe Cole rescues a point for West Ham who draw 1–1 at home with QPR.[44]
23 January 2013: A 5–1 defeat by Arsenal at the Emirates gives West Ham their heaviest defeat of the season in a match which also sees Dan Potts taken to hospital with concussion.[45]
22 March 2013: West Ham are confirmed as the anchor tenants for the Olympic Stadium. They will pay £15 million towards the conversion of the stadium, pay £2 million a year in rent and will move to the stadium in 2016.[46]
8 May 2013: Winston Reid is named Hammer of the Year for the 2012–13 season.[47]
12 May 2013: West Ham lose their last away game of the season 2–0 to Everton. West Ham finish with only 11 away goals, the lowest in the league.[48][49]
19 May 2013: On the final day of the 2012–13 Premier League season, West Ham beat already relegated Reading 4–2 with a hat-trick scored by Kevin Nolan. They end the season in tenth place with 46 points collected from 38 matches.[50]
24 May 2013: West Ham achieve the highest average home attendance in their 118-year history: 659,677 supporters attended home games, an average of 34,720 per game.[51]
Source: Premier League Rules for classification: 1) Points; 2) Goal difference; 3) Goals scored; 4) Play-offs (only if needed to decide champion, teams for relegation or teams for UEFA competitions).[52] Notes: