Related Clues:
- Chronological records
- Presidencies, to historians
- Sections of history
- Mound stats
- Important time periods
- Gay '90s, Roaring '20s, et al.
- Oft-named time periods
- Time pieces?
- Archive documents
- Big periods
- Some historical spans
- Paleozoic and Edwardian, e.g.
- Stretches of history
- Remembered periods
- Spanish form of 'to be' after 'tú'