Possible Clues:

• Comment before retiring
• 1959 top 10 hit for Ricky Nelson
• 'I should turn in'
• ''Gotta go now!''
• 'We should get going'
• "I should get going"
• ''I really should be going''
• "This is close to my bedtime!"
• 'I should hit the hay'
• "Gosh, look at the time"