Related Clues:

• Whiskey or wine datum
• Año, to Andrew
• Century fraction
• Wine label datum
• Decade tenth
• It's marked by a ring in a trunk
• Y2K, for one
• Wine-label datum
• Wine taster's guesstimate
• Class ring inscription
• Calendar length
• Senior __
• 88 Earth days, on Mercury
• One Earth orbit
• Wine lover's concern