Historical clue formulations

• Address no longer than 18 minutes — 2026-05-08
• The first one was delivered in 1984 — 2025-06-18
• The first one was delivered in 1984 — 2016-10-28
• Multimedia think piece — 2016-08-26
• Presentation by Bill Clinton in 2007 or Bill Gates in 2010 — 2013-07-27