Historical clue formulations

• Annoyance in the middle of a season, perhaps — 2025-06-07
• Plot ruiner — 2024-07-21
• "Darth Vader is Luke's father," e.g. — 2018-07-01
• You may want to stop reading when you see this — 2015-11-15
• Surprise giveaway? — 2014-12-13
• Unread part of a movie review, maybe — 2011-04-21
• Unwanted plot giveaway — 2010-07-06
• Auto option — 2001-04-22