This is a timeline of events that happen during the Sixth Season, or approximately between May, 2012 and May, 2013.
THE TIMELINE
112. “The Date Night Variable”
May 28, 2012 – discuss Sheldon & Amy’s date; Howard tells mom not moving
May 28, 2012 – 2nd ann of Amy & Sheldon’s first date, Bernadette confronts Howard
May 30, 2012 – Bernadette & Howard talk
113. “The Decoupling Fluctuation”
July 6, 2012 – girls discuss boyfriends, they go to movies, Sheldon talks to Penny, Howard & Bernadette talk
July 6, 2012 – they play cards, Penny can’t break up with Leonard
July 7, 2012 – Penny talks with Amy & Bernadette
July 8, 2012 – Howard gets grafeittied in space
114. “The Higgs Boson Observation”
August 9, 2012 – Howard & Bernadette talk
August 10, 2012 – Sheldon interviews Alex
August 11, 2012 – Amy gets suspicious of Alex, then Penny does
115. “The Re-Entry Minimization”
day 1 – Howard returns from orbit
September 22, 2012 – Howard returns to LA
116. “The Holographic Excitation”
October 25, 2012 – discuss Stuart’s Halloween party
October 26, 2012 – Penny visits Leonard’s lab
October 27, 2012 – Penny visits Leonard at lab
October 31, 2012 – Halloween party at comic book store
117. “The Extract Obliteration”
November 1, 2012 – Sheldon starts words with friends with Steven Hawking, Penny is back taking 1 course at college
November 2, 2012 – Penny tells Leonard about her course
November 5, 2012 – Howard has not played, Leonard rewrites
November 6, 2012 – Penny mad at Leonard
November 8, 2012 – Penny got B- on paper by Amy & Bernadette, Hawking wins
118. “The Habitation Configuration”
November 8, 2012 – during filming ‘Fun with Flags’ Amy asks Sheldon to tell Wil Wheaton to leave, when he don’t she does leave
November 9, 2012 – Howard & Bernadette argue at the Cheesecake Factory re Howard moving out, Sheldon visits Amy
November 10, 2012 – Howard moves. Sheldon visits Wil Wheaton
November 11, 2012 – Fun With Flags & Levar Burton
119. “The 43 Peculiarity”
November 15, 2012 – discuss Sheldon’s disappearance at 2:45
November 16, 2012 – Raj & Howard follows Sheldon, enter room
November 17, 2012 – Howard & Raj discuss 43, Penny says she loves Leonard
November 18, 2012 – spycam on Sheldon
November 19, 2012 – Sheldon plays hacky sack
120. “The Parking Spot Escalation’
November 29, 2012 – Howard gets assigned Sheldon’s parking spot
November 30, 2012 – Sheldon steal Howard’s IronMan helmet, Howard sits on couch naked
December 1, 2012 – after Bernadette has Amy’s car towed, Amy hits Penny
December 2, 2012 – Sheldon sits in parking spot, Sheldon & Howard agreement
December 3, 2012 – make-up dinner at Cheesecake Factory
December 4, 2012 – Sheldon takes cushion to dry cleaners
121. “The Fish Guts Displacement”
December 6, 2012 – Amy gets sick, Howard and Bernadette’s eat with her parents
December 7, 2012 – Penny teaches Howard how to fish
December 8, 2012 – Amy gets spanked, Howard & Mike go fishing
122. “The Santa Simulation”
December 13, 2012 – discuss plying Dungeons & Dragons
Dec 15, 2012 play Dungeons &Dragons, Raj w/girls at bar
123. ‘The Egg Salad Equivalency”
January 3, 2013 – Alex asks Leonard to dinner
January 4, 2013 - Sheldon’s council of ladies
January 5, 2013 – Sheldon talks to Alex
January 6, 2013 – Sheldon at human resources
January 7, 2013 – Leonard, Howard & Raj at human resources, tells Alex to take course
January 8, 2013 - Penny ‘s smart glasses
124. “The Bakersfield Expedition”
January 12, 2013 trip to Bakersfield con, girls read comics
125. “The Cooper-Kripke Inversion”
January 31, 2013 – Howard and Raj order action figures
February 1, 2013 – Sheldon & Kripke have to work together
February 2, 2013 - Sheldon & Kripke trade work, Howard & Raj order 3d printer
February 3, 2013 – Sheldon pretends to be sick and then to have sex with Amy, Bernadette gets made at Howard about 3d printer
February 4, 2013 – Howard sells his half of 3d printer
126. “The Spoiler Alert Segmentation”
February 7, 2013 – Leonard moves out
February 9, 2013 - Raj eats dinner with Mrs Wolowitz
February 10, 2013 – Raj still there, big 4 way fight between Sheldon, Amy, Penny and Leonard
127. “The Tangible Affection Proof”
February 12, 2013 – Penny & Leonard have supper
February 13, 2013 – Raj & Stuart plan Valentine’s Day party
February 14, 2013 – Alex buys gifts, Penny sees Gretchen, Raj meets Lucy
February 15, 2013 – Sheldon has an ice cream headache
February 16, 2013 – Sheldon thinks he’s bitten by a Chinese bird spider
128. “The Monster Isolation”
February 14, 2013 – is day 3 of tangible affection proof
February 21, 2013 – Sheldon’s Fun With Flags episode with Penny, Howard, Leonard and Bernadette visit Raj
February 22, 2013 – Sheldon webchats with Amy, he thanks Penny, Lucy returns
Friday, February 23, 2013 – A Streetcar Named Desire performance, Lucy visits Raj
129. “The Contractual Obligation Implementation”
March 7, 2013 – the guys discuss promoting women in science
Friday, March 8, 2013 – Sheldon, Leonard & Howard go to his school & girls skip & Raj’s date
130. “The Closet Reconfiguration”
Monday, March 31, 2013 – at party Sheldon finds letter from Howard’s father to Howard
March 16, 2013 – the girls force Sheldon to talk
March 17, 2013 – other party where they reveal/don’t reveal message to Howard
131. “The Tenure turbulence””
March 28, 2013 – they learn of professor Tupperman’s death
March 29, 2013 – everyone smoozes Ms. Davis & learns the tenure committee will be at Professor Tupperman’s memorial service
Thursday, April 4, 2013 - memorial service for Professor Tupperman
April 5, 2013 – Sheldon apologizes to Ms. Davis
April 13, 2013 –Sheldon finds a curly fry in his regular fries, makes an unscheduled video call to Amy [The Raiders Minimization]
132. “The Closure Alternative”
April 25, 2013 – discus Sheldon’s disquiet at cancellation of Alphas, Raj finds Lucy’s Blog online
April 26, 2013 – Amy has a plan for Sheldon
April 27, 2013 – Leonard & Penny watch Buffy the Vampire Slayer
April 28, 2013 – Amy puts plan in effect, Bernadette & Penny talk about enthusiasm, Raj and Lucy’s date
133. “The Proton Resurgence”
May 2, 2013 – Sheldon finds Professor Proton (Arthur Jeffries, Ph. D from Cornell)online
May 3, 2013 – Raj asks Howard to watch Cinnamon
May 4, 2013 - Raj brings Cinnamon over to Howard’s
May 5, 2013 – Cinnamon goes missing & Professor Proton comes over
May 6, 2013 – Sheldon fills in at a Korean family in Alhambra
134. “The Love Spell Potential
May 9, 2013 – girls don’t go to Vegas, and play dungeons & dragons with the guys
135. “The Bon Voyage Reaction”
May 16, 2013 – Howard tells Leonard he recommended him to Steven Hawking
May 17, 2013 – Leonard tells Penny
May 18, 2013 – party discussed
May 19, 2013 – Lucy meets Amy
May 20, 2013 – Sheldon & Penny shop for party
Friday, May 21, 2013 – party