Historical clue formulations

• Alice, in Wonderland — 2026-05-06
• Someone dropping by — 2019-07-22
• Guest — 2017-08-20
• Tourist — 2014-03-21
• One who may sign a book — 2001-09-15
• An American in Paris? — 2001-05-27
• Drop-in — 1999-10-01