Related Clues:

• Edwardian or Victorian
• Significant stretch
• For a spell
• Very long stretch
• Geologist's measure
• Hoped-for low number: Abbr.
• Memorable period
• Time on end
• Many, many moons
• Unit of Time
• Special time
• There are 12 in a year
• Historic period
• Chapter in history
• Billion years, to a geologist