EPOCHS
| Date | Clue |
|---|---|
| 2026-04-28 | Significant periods |
| 2026-02-21 | Big times |
| 2025-01-09 | Time periods |
| 2022-02-08 | Long stretches |
| 2013-12-23 | Pleistocene and Eocene, for two |
| 2006-08-02 | They last a long time |
| 2006-04-09 | Times to remember |
| 2005-06-03 | They're shorter than periods |
| 2005-05-02 | Long times |
| 2005-02-02 | Historical periods |
| 2002-06-19 | Noteworthy periods |
| 2002-01-26 | Period pieces |
| 2000-04-27 | Ages |
| 1996-11-29 | Long stretches |
| 1995-03-12 | Eras |