Historical clue formulations

• Head of Kronos? — 2026-07-29
• 10th of 24 — 2024-10-20
• 10th in a series — 2024-06-22
• Letter after I — 2023-08-05
• ___ Alpha Theta, first Greek-letter sorority in the U.S. — 2019-04-25
• 10th of 24 — 2017-08-16
• Letter before lambda — 2015-11-10
• Honor society letter — 2015-10-21
• Phi Beta ___ — 2015-09-21
• Fraternity letter — 2013-10-23
• Symbol of Einstein's gravitational constant — 2013-03-02
• Phi Beta ___ — 2004-04-21
• Letter after Beta in a society's name — 2003-09-29
• Certain sorority woman — 2002-09-01
• Key letter — 2002-08-09
• Honor society letter — 1995-08-02