Historical clue formulations

• ___ Mountain (ski area in Killington, Vt.) — 2026-01-23
• One-trillionth: Prefix — 2025-10-10
• ___ de gallo (Mexican salsa) — 2025-10-08
• ___ de gallo (salsa variety) — 2024-08-12
• ___ de gallo — 2024-03-27
• Salsa variety, casually — 2023-05-07
• ___ de gallo (condiment) — 2020-07-08
• ___ de gallo — 2019-08-08
• One trillionth: Prefix — 2015-09-27
• Micro : millionth :: ___ : trillionth — 2015-08-31
• ___ Rivera (Los Angeles suburb) — 2012-11-16
• Boulevard where Fox Studios and the Los Angeles Convention Center are located — 2011-08-14
• ___ Rivera, Calif. — 2009-02-20
• Trillionth: Prefix — 2008-08-24
• One trillionth: Prefix — 2008-05-04
• ___ de gallo sauce — 2006-04-05
• Trillionth: Prefix — 2003-01-08
• _____ Rivera, Calif. — 1994-12-12
• Trillionth: Prefix — 1994-03-19