Related Clues:

• The olden days
• Time in the past
• Word before due or tense
• Happy golden days of ___
• Arthurian times, say
• "... golden days of ___"
• It's history
• In days of ___ (in times past)
• Word used in telling time, sometimes
• Existing only in memory
• Like history
• "Back to the Future" destination
• Film noir classic, "Out of the ___"
• Days of King Arthur's Round Table, e.g.
• One of the tenses