Possible Clues:

• Datebook entry, for short
• Engagement calendar entry: Abbr.
• Part of a GP's schedule
• Secy.'s penciling
• Calendar abbr
• Part of an M.D.'s sched.
• Date with a D.D.S., e.g.
• BlackBerry entry: Abbr.
• 8-Down, e.g.: Abbr
• Engagement: Abbr