The following events occurred in the 1970s:
Events
The Big Bang Theory
- 1972-1973: Leonard's sister was born
- May 7, 1974: Stuart Bloom is born
- March 13, 1975: Sheldon's brother George Cooper Jr. was born
Young Sheldon
- 1974 - 1975: Tam Nguyen is born
- December 17, 1979: Amy was born