| Clue | Source | Date |
|---|---|---|
| 2500, in Roman numerals | Eugene Sheffer | 14 Feb 2024 |
| 2500, in Roman numerals | Eugene Sheffer | 10 Feb 2023 |
| L squared, in Roman numerals | Jonesin | 26 Mar 2015 |
| L squared | ||
| 2500, in old Rome | ||
| L squared | ||
| L squared | ||
| L squared | ||
| 2500, in old Rome | ||
| Mid-millennium year | ||
| CCL x X | ||
| End of the 25th century | ||
| Roman square? | ||
| Year around the middle of our millennium | ||
| Twice MCCL | ||
| CCL x X | ||
| C x XXV | ||
| Sci-fi year | ||
| Roman 2,500 |