Historical clue formulations

• Business appt. — 2022-05-10
• Business appt., often — 2015-04-20
• Get-together: Abbr. — 2014-08-13
• Part of a business sched. — 2011-10-02
• Appt., often — 2011-03-29
• Subj. of a 39-Down reminder — 2010-10-21
• Brief encounter? — 2008-05-25
• Listing on a business sched. — 2005-09-18
• Part of an office sched. — 2004-02-07
• Sess. — 2002-09-27
• Appt. calendar notation — 2002-03-20
• Bus. get-together — 1998-09-29
• Bank offering: Abbr. — 1998-07-25
• Get-together: Abbr. — 1996-04-28
• Get-together: Abbr. — 1995-10-05
• Get-together: Abbr. — 1993-12-05