Historical clue formulations

• "How interesting!" — 2026-06-07
• "Wow, cool!" — 2026-04-01
• "Golly, that's cool!" — 2025-12-07
• "Wow, cool!" — 2025-06-03
• "That's pretty nifty!" — 2024-05-21
• "Wow, super!" — 2023-01-29
• "Spiffy!" — 2022-01-04