Historical clue formulations

• Agree to accept marketing emails, say — 2026-03-23
• Choose to receive email and text alerts, say — 2025-04-28
• Accept cookies, say — 2024-06-29
• Join — 2023-04-07
• Choose to participate — 2022-05-18
• Choose to participate — 2021-02-07
• Choose to participate — 2021-01-03
• Join — 2020-06-20
• Decide to join — 2018-02-01
• Join voluntarily — 2017-11-30
• Consciously join — 2017-07-05
• Sign up to receive email alerts, say — 2015-07-26
• Choose to participate — 2014-03-31
• Decide to take part — 2013-03-25
• Choose to participate — 2011-07-11
• Choose to participate — 2009-08-16
• Decide to take part — 2008-10-12
• Sign up for an offering — 2004-01-04