Related Clues:

• Four quarters
• Period of time
• Wine connoisseur's concern
• '00, e.g.
• Subscription length, often
• See 54-Across
• Junior, for one
• 2001, e.g.
• Birthday-to-birthday span
• Time span
• 2000, for one
• Period
• With 28-Across, late December
• Time period
• Sentence unit