| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| Eponymously named & in use for more than 1,600 years, it was based in part on concepts from the Greek mathematician Sosigenes | the Julian calendar | FJ | TIME | 2025-05-23 | #9340 | ||
| This calendar devised around 45 B.C. was used by western nations for over 1,500 years | the Julian calendar | $1,000 | J | TIME | 2002-07-05 | #4125 | |
| It began in 2637 B.C., the year in which Emperor Huang-ti supposedly invented it | the (Chinese) calendar | $600 | DJ | TIME | 1986-03-12 | #393 |