Historical clue formulations

• Sound at the beginning and end of a meditation, perhaps — 2026-04-06
• Hit it! — 2022-12-25
• Smoke shop purchase — 2022-04-24
• Water pipe — 2020-06-28
• Beer ___ (frat party item) — 2019-03-04
• Head shop buy — 2016-03-25
• Sound from Big Ben — 2013-12-23
• Sound from Big Ben — 2011-04-19
• Signal at a pagoda, maybe — 2002-09-26
• Large bell's sound — 2002-08-03
• Big bell sound — 2001-07-01
• Large bell sound — 1998-01-13
• Deep bell sound — 1997-07-27