Here's what's airing on TBS on April Fools Day, all times Eastern:

6am-Modern Family: "Coal Digger" (S1E5, OAD: October 21, 2009)
6:30am-Modern Family: "Run from Your Wife" (S1E6, OAD: October 28, 2009)
7am-Modern Family: "Moon Landing" (S1E14, OAD: February 3, 2010)
7:30am-Modern Family: "My Funky Valentine" (S1E15, OAD: February 10, 2010)
8am-Modern Family: "Little Bo Bleep" (S3E13, OAD: January 18, 2012)
8:30am-Modern Family: "Spring-a-Ding-Fling" (S5E16, OAD: March 5, 2014)
9am-Modern Family: "Tough Love" (S9E9, OAD: December 6, 2017)
9:30am-Modern Family: "The Prescott" (S11E10, OAD: January 8, 2020)
10am-Friends: "The One with Two Parts: Part 2" (S1E17, OAD: February 23, 1995)
10:30am-Friends: "The One After the Super Bowl: Part 2" (S2E13, OAD: January 28, 1996)
11am-Friends: "The One with Barry and Mindy's Wedding" (S2E24, OAD: May 16, 1996)
11:30am-Friends: "The One Where No One's Ready" (S3E2, OAD: September 26, 1996)
12pm-Friends: "The One with the Metaphorical Tunnel" (S3E4, OAD: October 10, 1996)
12:30pm-Friends: "The One with the 'Cuffs" (S4E3, OAD: October 9, 1997)
1pm-Friends: "The One with the Fake Party" (S4E16, OAD: March 19, 1998)
1:30pm-Friends: "The One with All the Resolutions" (S5E11, OAD: January 7, 1999)
2pm-Friends: "The One Where Joey Loses His Insurance" (S6E4, OAD: October 14, 1999)
2:30pm-Friends: "The One with the Routine" (S6E10, OAD: December 16, 1999)
3pm-Friends: "The One Where Ross Is Fine" (S10E2, OAD: October 2, 2003)
3:30pm-Friends: "The One with Ross's Grant" (S10E6, OAD: November 6, 2003)
4pm-The Big Bang Theory: "The Adhesive Duck Deficiency" (S3E8, OAD: November 16, 2009)
4:30pm-The Big Bang Theory: "The Pants Alternative" (S3E18, OAD: March 22, 2010)
5pm-The Big Bang Theory: "The Higgs Boson Observation" (S6E3, OAD: October 11, 2012)
5:30pm-The Big Bang Theory: "The Parking Spot Escalation" (S6E9, OAD: November 29, 2012)
6pm-The Big Bang Theory: "The Closure Alternative" (S6E21, OAD: April 25, 2013)
6:30pm-The Big Bang Theory: "The Relationship Diremption" (S7E20, OAD: April 10, 2014)
7pm-The Big Bang Theory: "The Bachelor Party Corrosion" (S9E3, OAD: October 5, 2015)
7:30pm-The Big Bang Theory: "The Recollection Dissipation" (S10E20, OAD: April 6, 2017)
8pm-All Elite Wrestling: Dynamite
10pm-Impractical Jokers: "Happily Never After" (S12E18, OAD: March 20, 2026)
10:30pm-Impractical Jokers: "A Tight Spot" (S12E16, OAD: March 5, 2026)
11pm-Impractical Jokers: "Haunting of the Joker House" (S12E10, OAD: January 15, 2026)
11:30pm-Modern Family: "En Garde" (S1E7, OAD: November 4, 2009)
12am-Modern Family: "Great Expectations" (S1E8, OAD: November 18, 2009)
12:30am-Modern Family: "Fizbo" (S1E9, OAD: November 25, 2009)
1am-Modern Family: "Undeck the Halls" (S1E10, OAD: December 9, 2009)
1:30am-Modern Family: "Up All Night" (S1E11, OAD: January 6, 2010)
2am-Modern Family: "Not in My House" (S1E12, OAD: January 13, 2010)
2:30am-Modern Family: "Fifteen Percent" (S1E13, OAD: January 20, 2010)
3am-Modern Family: "Moon Landing" (S1E14, OAD: February 3, 2010)
3:30am-Modern Family: "My Funky Valentine" (S1E15, OAD: February 10, 2010)
4am-Modern Family: "Fears" (S1E16, OAD: March 3, 2010)
4:30am-Modern Family: "Truth Be Told" (S1E17, OAD: March 10, 2010)
5am-Modern Family: "Starry Night" (S1E18, OAD: March 24, 2010)
5:30am-Modern Family: "Game Changer" (S1E19, OAD: March 31, 2010)