Historical clue formulations

• "Why ___?" — 2023-03-11
• Hassle — 2021-01-03
• Rub the wrong way — 2016-02-21
• Spam, e.g. — 2013-03-24
• "Oh, ___!" (Pooh expression) — 2009-10-21
• Irritate — 2005-03-29
• Bug — 1996-01-31