Historical clue formulations

• High-level advisers — 2023-11-30
• Government program heads, informally — 2023-07-12
• Some presidential appointees — 2016-08-10
• Bygone Russian autocrats — 2015-08-03
• Bygone emperors — 2014-10-24
• Ivan, Nicholas and Peter — 2011-06-06
• Industry leaders — 2001-03-23
• Bygone leaders — 1998-08-13
• Hermitage figures — 1995-07-14