Historical clue formulations

• You won't actually die of it — 2026-07-05
• Lack of engagement — 2022-03-06
• Reason to draw a doodle, maybe — 2021-03-16
• Along with pain, one of "the two enemies of human happiness," per Schopenhauer — 2017-10-04
• Cause of yawns — 2017-05-23
• Reason to stare off into space — 2016-02-29
• A rut often leads to it — 2016-01-29
• Cause of yawning — 2014-07-15
• The blahs — 2013-09-10
• Reason to doodle — 2011-10-16
• Yawn inducer — 2009-03-31
• Routine result — 1999-09-19