Historical clue formulations

• Chairs usually have them — 2023-11-03
• Intentions — 2020-11-07
• They're covered by boards — 2018-06-23
• Ulterior motives — 2016-07-21
• Zealots have them — 2007-12-14
• Lists for meetings — 2007-04-30
• Conference planners' needs — 2006-12-29
• Some are hidden — 2005-08-21
• Slates — 2004-05-04
• Meeting needs — 2003-05-18
• Hidden items, sometimes — 1997-04-24
• Meeting musts — 1994-07-26