Related Clues:
- High-school dances
- Parts of timelines
- Ballpark figures?
- Major time periods
- Senior soirees
- Distinct time spans
- Geological epochs
- President's tenures, so to speak
- Significant periods of history
- Some baseball stats
- Remarkable times
- Mesozoic and Cenozoic
- Geology periods
- Parts of eons
- Memorable periods in history