Related Clues:

• Big Band, e.g.
• A very long period of time
• 365 billion days, in astronomy
• Time division
• Golden and Bronze, e.g.
• Gets better?
• Time-line span
• Several eras
• Distinct period
• Stat. for Pedro Martinez
• Chronology component
• Muslim or Christian, e.g.
• Shakespeare's seven
• Loses immediacy
• Historian's study