Historical clue formulations

• SoCal sch. — 2026-08-02
• SoCal sch. whose teams are the Aztecs — 2026-03-16
• Sch. with a satellite campus in Calexico — 2025-09-18
• Calif. school that runs the Mount Laguna Observatory — 2025-05-23
• Calif. school less than an hour's ride from Tijuana — 2024-10-12
• Calif. school that's home to the Aztecs — 2023-10-10
• Home to the N.C.A.A.'s Aztecs: Abbr. — 2023-08-03
• Southern California sch. — 2023-04-30
• Calif. school that's about 20 miles from the Mexican border — 2021-09-30
• Southern California sch. — 2021-07-06
• Calif. school that's home to the Aztecs — 2019-09-05
• Calif. school near the Mexican border — 2017-09-02