Historical clue formulations

• Self-congratulation — 2026-07-31
• "Aren't I great?!" — 2021-07-06
• "I rule!" — 2021-01-21
• "I rule!" — 2018-04-03
• "I rock!" — 2017-09-17
• "Man, I did good!" — 2017-04-15
• Self-congratulatory words — 2016-03-31
• "I rock!" — 2016-01-12
• "Lookie what I did!" — 2012-08-17