Historical clue formulations

• Datebook data: Abbr. — 2023-12-20
• Sched. listings — 2017-01-19
• Data in a daily planner: Abbr. — 2016-04-19
• Engagement calendar listings: Abbr. — 2015-09-08
• Listings in a daily planner: Abbr. — 2014-07-01
• Meetings entered in P.D.A.'s: Abbr. — 2013-11-14
• Listings in a dr.'s calendar — 2010-05-17
• Calendar data: Abbr. — 2009-08-09
• Secretarial jottings: Abbr. — 2007-02-22
• Datebook data: Abbr. — 2003-06-01
• Calendar pencilings: Abbr. — 2002-07-11
• Datebook listings: Abbr. — 1994-05-15