Related Clues:

• Calendar units
• They break in the morning
• Calendar components
• Year parts
• Spin cycles?
• Week parts
• Weekly septet
• Cell-wall tally
• "Around the World in Eighty ___"
• There are 14 in a fortnight
• Periods of light
• Mayfly’s lifespan, at most
• Year's 365
• Month components
• "The Twelve ___ of Christmas"