Historical clue formulations

• Letter after chi — 2026-08-20
• Telepathy, e.g. — 2026-06-17
• Penultimate Greek letter — 2026-05-21
• Penultimate Greek letter — 2026-05-14
• Tire inflation meas. — 2026-03-11
• Pressure meas. — 2026-02-22
• Trident-shaped letter — 2026-02-18
• Tire meas. — 2026-02-14
• Tire inflation meas. — 2026-01-06
• Letter after chi — 2025-11-26
• Inflation meas. — 2025-06-01
• #23 of 24 — 2025-04-03
• Tire inflation abbr. — 2025-02-06
• Tire reading, for short — 2025-01-12
• Trident-shaped Greek letter — 2024-11-26
• Last of five rhyming Greek letters — 2024-11-10
• Letter before omega — 2024-08-18
• Greek consonant hidden in the names of two Greek vowels — 2024-07-17
• Measure of inflation, in brief — 2024-04-18
• Pressure meas. — 2024-04-04
• Three-point letter you won't find in Scrabble? — 2024-01-25
• Greek letter shaped like a pitchfork — 2024-01-23
• Greek letter after chi — 2023-11-20
• Letter before omega — 2023-09-26
• Measure of inflation: Abbr. — 2023-07-22
• Inflation measure, in brief — 2023-04-19
• Penultimate Greek letter — 2023-03-21
• Next-to-last Greek letter — 2023-02-21
• Abbr. at a pump — 2022-12-09
• No. listed on the inside of car doors, often — 2022-10-23
• Wave function symbol — 2022-09-16
• Inflation spec — 2022-08-04
• Trident-shaped Greek letter — 2022-07-04
• Letter resembling Indiana University's logo — 2022-06-23
• Three-pronged letter — 2022-06-19
• Pitchfork-shaped letter — 2022-04-14
• Trident look-alike — 2021-10-24
• Inflation stat, for short — 2021-05-29
• ... phi, chi, ___, omega — 2021-05-04
• Letter before omega — 2021-04-27
• Inflation fig. — 2021-04-08
• Letters on a tire — 2020-09-23
• Trident-shaped letter — 2020-09-03
• Trident-shaped letter — 2020-02-04
• Abbr. on a car tire — 2020-01-17
• It's pitchfork-shaped — 2019-12-22
• Chi follower — 2019-11-06
• Inflation fig. — 2019-10-04
• Fraternity letter — 2019-08-29
• Letter that sounds like an expression of relief — 2019-08-08