Historical clue formulations

• Snicker — 2026-09-18
• Little laugh — 2023-11-14
• Giggle — 2022-06-19
• Snickers piece? — 2021-10-30
• Quaint giggle — 2020-03-22
• Titter — 2018-05-13
• [I find this mildly amusing] — 2016-08-19
• Snicker — 2016-07-18
• Snicker — 2015-09-25
• Snicker — 2014-12-23
• Response to being tickled — 2012-02-03
• Giggle — 2008-11-24
• [Giggle] — 2007-09-12
• Giggle — 2006-09-14