Historical clue formulations

• City hall V.I.P.s — 2018-02-12
• Key presenters — 2015-06-07
• City chiefs — 2010-09-26
• City hall leaders — 2009-06-01
• LaGuardia and others — 2008-03-14
• Coolidge, Cleveland and Andrew Johnson, once — 2007-06-24
• Jacques Chirac and Grover Cleveland, once — 2005-10-28
• Council heads, maybe — 2003-05-10
• Heads downtown? — 2003-01-08
• Council chiefs — 1994-12-01
• Giuliani and others — 1994-05-09
• Daley and others — 1994-04-05