Please note that the game writers did NOT account for individual character birthdays when creating the timeline and assigning ages across games.  Because of this oversight every PW character ends up having a birthday within the same few weeks (see explanation here).

WARNING:  This version contains GK dates AND GK2 SPOILER DATES

 

1940 ?? Bruto Cadaverini born
1946 ?? Quercus Alba born
1950 ?? Victor Kudo born
1951 ?? Manfred von Karma and Damon Gant  born
1952 ?? Marvin Grossberg and Magnifi Gramarye born
1956 ?? Zinc White born
1958 ?? Deid Mann and Tyrell Badd born
1964 ?? Winston Payne and Yanni Yogi born
1965 ?? Russel Berry born
1967 ?? Ernest Amano Born
1968 ?? Robert Hammond and Oliver Deacon born
1969 ?? Misty Fey born
1970 ?? Kane Bullard, Bikini, Winfred Kitaki and Drew Misham born
1971 ?? Moe the Clown and Byrne Faraday born
1976 ?? Furio Tigre born
1977 ?? Redd White born
1979 ?? Jack Hammer, Jean Armstrong and Mack Rell born
1980 ?? Frank Sahwit, Bruce Goodman, Guy Eldoon, Pal Meraktis, and Zak Gramarye born
1981 ?? Colias Palaeno born
1982 ?? Dee Vasquez, Turner Grey and Valant Gramarye born
1983 ?? Jake Marshall born
1984 ?? Sal Manella, Luke Atmey and Plum Kitaki born
1985 ?? Diego Armando and Angel Starr born
1986 ?? Detective Gumshoe, Ben, Lamiroir, and Thalassa Gramarye born
1987 ?? Terry Fawles, Lana Skye and Manny Coachen born
  Sept. 6th Dustin Prince born.
1988    
1989 ?? Mia Fey, Jacques Portsman, Buddy Faith, Calisto Yew and Ka-Shi Nou born
1990 ?? Valerie Hawthorne, Glen Elg, Spark Brushel and Akbey Hicks born
1991 ?? Acro, Doug Swallow, Romein LeTouse and Shi-Long Lang born
1992 ?? Phoenix Wright and Miles Edgeworth born
1993 ?? Larry Butz, April May, Will Powers, Dahlia Hawthorne, Iris, and Viola Cadaverini born
1994 ?? Cindy Stone, Lotta Hart, Adrian Andrews, Mike Meekins, Kristoph Gain, Rhoda Teneiro, and Cammy Meele born
1995 ?? Maggey Byrde, Richard Wellington, Bat, and Ron and Desireé DeLite born
1996 ?? Ini Miney, Max Galactica, Matt Engarde, Juan Corrida born
1997 ?? Lance Amano born
1998 ??  
1999 ?? Franziska von Karma, Maya Fey, Penny Nichols and Lauren Paups born
2000 ?? Ema Skye born
2001 ?? Regina Berry and Kay Faraday born
Early Phoenix is accused by his class of stealing Miles' lunch money
Dec 28 DL-6 Incident occurs, Gregory Edgeworth is killed, Manfred von Karma takes vacation.
2002 ?? Klavier Gavin and Daryan Crescend are born
Jun Karma returns from his "vacation." 
2003   Thalassa marries her first husband.
2004 ?? Apollo Justice and Wesley Stickler born.  Thalassa's first husband is killed.
2005 ?? Olga Orly and Alita Tiala born
2006    
2007 ?? Wocky Kitaki and Vera Misham born
Feb Dahlia steals a sapphire from her father and is presumed dead, Terry is arrested and convicted for her murder.
2008   Yuuko Yew is killed by Manny Coachen, but he is not convicted [KG-8]
2009 ?? Pearl Fey and Cody Hackins born
2010    
2011 ?? Trucy born
August Police Officer Gumshoe becomes Detective Gumshoe, accident at Global Studios is covered up
September 8 Deid Mann is killed by Mack Rell under orders from Yatagarasu [KG-8 2]
September 10 Mack Rell and Byrne Faraday are killed in the courthouse [AAI case 4]
2012 ?? Machi Tobaye born
?? Franziska becomes a prosecutor in Germany
Feb 16 State vs Fawles.  Edeworth's first case (age 20).  Mia Fey's first case (age 23). [T&T case 4]
August 27 Diego Armando poisoned.  Phoenix meets Dahlia
2013 April 11 State vs Wright  [T&T case 1]
2015 Feb SL-9 Incident.  Neil Marshall dies
?? Thalassa Gramarye disappears
2016 May 2 Mimi Miney dies in a car accident, Ini is hospitalized.  Phoenix passes his bar exam and becomes a lawyer.
Aug 3 State vs Butz.  Phoenix Wright's first case [PW case 1]
Sept 5-9 State vs Fey [PW case 2]
Oct 16-19 State vs Powers  [PW case 3]
Dec Ini Miney released from hospital
Dec 25-28 State vs Edgeworth  [PW case 4]  Maya returns home to train.
2017 Feb State vs Skye  [PW case 5].  Miles Edgeworth leaves prosecutors' office.
March Maggey starts dating Dustin Prince
May Pink Princess is cancelled
June Accident occurs at Berry Big Circus
June 19-22 State vs Fey [JFA case 2]
Sept 8 State vs Byrde  [JFA case 1]
Dec 28-30 State vs Galactica  [JFA case 3]
2018 March 20-23 State vs Engarde  [JFA case 4]
Sept Viola is involved in a car accident and hospitalized
Sept 11-13 State vs DeLite  [T&T case 2]
Oct 11-12 State vs DeLite [changed for the US release]
Dec State vs Byrde 
2019 Jan 6-8 State vs Byrde appeal  [T&T case 3]
Jan Dahlia executed
Feb 6-9 State vs Iris  [T&T case 5]
March 12 Akbey Hicks is murdered on board an iFly Airplace [AA1 case 2]
March 13 Oliver Deacon is murdered at Bando Land [AAI case 3]
March 14 Buddy Faith is murdered in Edgeworth's office. [AAI case 1]
Manny Coachen and Ka-Shi Nou are murdered [AAI case 5]
April 23 Magnifi Gramarye dies
April 29 State vs Enigmar.  Phoenix is disbarred.
May 13 Trucy comes to live with Phoenix.
2020    
2021    
2022    
2023    
2024 ?? Guy Eldoon takes over his father's noodle stand.
2025    
2026 Jan Wocky is shot by a member of the Rivales Family
April 20 State vs Wright [AJ case 1]
April ?? Romein LeTouse becomes Lamiroir's manager
June 15-17 State vs Kitaki [AJ case 2]
July 7-10 State vs Tobaye [AJ case 3]
October 7-9 State vs Misham [AJ case 4]

 

The AAI Birthday/Ages Contradiction

Like always, the ages are a little off.  Because the game takes place so close after the end of T&T, Edgeworth, Gumshoe, Franziska, and all the other returning characters have the same ages they were in T&T.  Because T&T is considered to have taken place "in 2018" (despite the fact that it straddles the new year) I've decided to set the birthdays of the new characters to T&T time instead of assuming 2019.  For example, in the game Rou is one year older than Edgeworth.  Therefore I've put his birthday in 1991, even though 2019 - 27 = 1992.