Historical clue formulations

• "Swell!" — 2026-05-13
• "Groovy" — 2026-05-05
• "Cool beans!" — 2026-04-02
• "Cool!" — 2026-02-17
• "Cool beans!" — 2025-12-13
• "Totally cool!" — 2025-10-12
• "That's keen!" — 2025-07-16
• "Groovy!" — 2024-03-31
• "Swell!" — 2024-01-11
• "Swell!" — 2023-11-28
• "Cool beans!" — 2023-11-02
• "Sweet!," quaintly — 2023-10-31
• "Cool beans!" — 2023-09-26
• "Groovy!" — 2023-06-02
• "Way cool!" — 2023-04-24
• "Cool!" — 2023-03-05
• "Swell!" — 2023-02-22
• "Nifty!" — 2022-12-24
• "Suh-weet!" — 2022-12-04
• "Swell!" — 2022-12-02
• "Oh, cool!" — 2022-09-30
• "Cool beans!" — 2022-05-01
• "Swell!" — 2022-04-03
• "Nifty!" — 2021-04-03
• "Super!" — 2021-03-09
• "Keen!" — 2020-11-09
• "Swell!" — 2020-07-27
• Old-school "Cool!" — 2020-02-03
• "Swell!" — 2019-12-08
• "Keen!" — 2019-11-25
• "Cool beans!" — 2019-09-17
• "Suh-weet!," quaintly — 2019-06-01
• Old-fashioned "Cool!" — 2019-02-12
• "Pretty slick!" — 2018-10-07
• Swell — 2018-03-03
• Old-fashioned "Awesome!" — 2017-07-17
• "Keen!" — 2017-05-21
• "Sweet!," old-style — 2017-02-22
• Cool, quaintly — 2016-12-20
• "Goody!" — 2016-10-16
• "Fantabulous!" — 2016-06-08
• Quaint cousin of "Suh-weet!" — 2016-01-26
• "That's really cool!" — 2015-12-30
• "Boss!" — 2015-08-05
• "That's cool!" — 2015-02-16
• "That's amazing!" — 2014-11-23
• "Cool beans!" — 2014-07-14
• "Nifty!" — 2014-05-20
• "Far out!" — 2014-01-27
• "Cool!" — 2014-01-13