James Kirk
- Full Name: James Tiberius Kirk
- Born: March 22, 2233; Riverside, Iowa, United States of America, Earth (ENT: "In a Mirror, Darkly, Part II"; ENT Novel: Last Full Measure)
- Species: Human
- Gender: Male
- Father: George Kirk Sr.
- Mother: Winona Kirk
- Brother: George Kirk Jr.
- Son: David Marcus
- By 2246: Resident, Tarsus IV (TOS: "The Conscience of the King")
- November 2251: Cadet, Starfleet Academy, command track (TOS: "Shore Leave")
- 2252: Ensign, navigator, Starfleet Academy field training; USS Republic (TOS: "Court Martial")
- 2255: Lieutenant junior grade, Starfleet Academy field training (TOS: "The Corbomite Maneuver")
- September 2256: Lieutenant, phaser gun crew, Starfleet; USS Farragut (TOS: "Obsession")
- January 2265: Captain, commanding officer, Starfleet; USS Enterprise (NCC-1701) (VAN Novel: Harbinger)
- By text, Spock had been serving in Starfleet slightly over 12 years by late September 2265
- Datapoint matches with Spock estranged from Sarek for 18 years as of "Journey to Babel", November 2267, upon entry to Starfleet Academy
- By "Menagerie", Spock had served under Pike for 11 years 4 months 5 days
- Assuming September graduation, first assignment to USS Enterprise, Spock began service under Pike September 2253, suggesting Kirk took command January 2265
- By Historian's Note, Kirk took command mid-2263, conflicting with "Journey to Babel" and "Menagerie" datapoints
- By text, Spock had been serving in Starfleet slightly over 12 years by late September 2265