Peter Silberman was born.
[Source - The Terminator]
Filming for The Terminator occurred in 1983, during which Earl Boen who portrayed Silberman was 37 (born in 1945). Therefore if Silberman was 37 in 1984 (when The Terminator was set) with Earl Boens birthdate of November 7th, he would have been born in 1946.
Miles Bennett Dyson was born.
[Source: Terminator 2: Judgment Day]
Filming for Terminator 2: Judgment Day occurred in 1990, during which Joe Morton who portrayed Dyson was 42 (born in 1947). Therefore if Dyson was 42 in 1994 (when Terminator 2 was set) with Morton's birthdate of October 18th, he would have been born in 1951.
Robert Brewster was born.
[Source - Terminator 3: Rise of the Machines]
Filming for Terminator 3: Rise of the Machines occurred in 2002, during which David Andrews who portrayed Brewster was 49 (born in 1952). Therefore if Brewster was 49 in 2004 (when Terminator 3 was set) with Andrews birthdate of November 2nd, he would have been born in 1954.
Hugh Ashdown was born.
[Source - Terminator Salvation]
Filming for Terminator Salvation occurred in 2008, during which Michael Ironside who portrayed Hugh Ashdown was 58 (born in 1950). Therefore if Ashdown was 58 in 2018 (when Terminator Salvation was set) with Ironside's birthdate of February 12th, he would have been born in 1960.
Serena Kogan was born.
[Source - Terminator Salvation]
Filming for Terminator Salvation occurred in 2008, during which Helena Bonham Carter who portrayed Serena Kogan was 42 (born in 1966). Therefore if Carter was 42 in 2003 (when Terminator Salvation's past scenes were set) with Carter's birthdate of May 26th, she would have been born in 1961.
Sarah J Connor was born.
[Source - Terminator 2: Judgment Day]
In Terminator 2: Judgment Day Dr. Silberman states Sarah's age as 29. With Terminator 2 set in June 1994, and with Linda Hamilton's birthdate of September 26th, Sarah would have therefore been born in 1964.
Marcus Wright was born.
[Source - Terminator Salvation]
Filming for Terminator Salvation occurred in 2008, during which Sam Worthington who portrayed Marcus was 31 (born in 1976). Therefore if Marcus was 31 in 2003 (when he was executed) with Sam's birthdate of August 2nd, he would have been born in 1971.
Barnes was born.
[Source - Terminator Salvation]
Filming for Terminator Salvation occurred in 2008, during which Common who portrayed Barnes was 36 (born in 1972) Therefore if Barnes was 36 in 2018 (when Terminator Salvation was set) with Common's birthdate of March 13th, he would have been born in 1982.
John Connor was born.
[Source - Terminator 2: Judgment Day]
John Connor's birthdate appears on the LAPD patrol car computer screen accessed by the T-1000 in Terminator 2: Judgment Day. This date also correlates with John's conception, which occurred May 13th, 1984.
Katherine Brewster was born.
[Source - Terminator 3: Rise of the Machines]
In Terminator 3: Rise of the Machines Katherine (Kate) Brewster states that she and John Connor were in the same grade at school, which with Claire Danes (who portrayed Kate) birthdate of April 12th means Kate was also born in 1985, the same year in which John was born.
Blair Williams was born.
[Source - Terminator Salvation]
Filming for Terminator Salvation occurred in 2008, during which Moon Bloodgood who portrayed Williams was 32 (born in 1975)Therefore if Williams was 32 in 2018 (when Terminator Salvation was set) with Moon's birthdate of September 20th, she would have been born in 1985.
Danny Dyson was Born
[Source - Terminator 2: Judgment Day]
Filming for Terminator 2: Judgment Day occurred in 1990, during which DeVaughn Nixon who portrayed Danny was 6 (born in 1983). Therefore if Danny was 6 in 1994 (when Terminator 2 was set) with Nixon's birthdate of July 8th, he would have been born in 1987.
Daniella Ramos was born,
[Source - Terminator Wiki]
Terminator Wiki states Daniella Ramos' age to be 21 during Terminator: Dark Fate, which is set in 2020. With Natalia Reyes' (who portrayed Dani) birthdate of February 6th, Dani would have therefore been born in 1999.
Kyle Reese was born.
[Source - The Terminator, 5th Draft Script]
In the 5th draft script for The Terminator Kyle Reese's age is stated to be 26. Having been sent back in time from July 11th, 2029, and with Michael Biehn's (who originally portrayed Reese) birthdate of July 31st, Reese would have therefore been born in 2002.
Star was born
[Source - Terminator Salvation]
Filming for Terminator Salvation occurred in 2008, during which Jadagrace who portrayed Star was 9 (born in 1999). Therefore if Star was 9 in 2018 (when Terminator Salvation was set) with Jadagrace's birthdate of September 1st, she would have been born in 2008.
Grace was born.
[Source - Terminator: Dark Fate]
Filming for Terminator: Dark Fate occurred in 2018, during which Mackenzie Davis who portrayed Grace was 31 (born in 1987). Therefore if Grace was 31 in 2042 (the year she was sent back in time from), with Davis' birthdate of April 1st, she would have been born in 2011.
