Historical clue formulations

• First name of Julius Caesar — 2026-09-21
• Given name of Caligula and Augustus — 2022-12-18
• Julius Caesar's first name — 2021-03-07
• Julius Caesar's first name — 2018-09-23
• Given name of Augustus and Caligula — 2015-01-24
• Common praenomen among Roman emperors — 2011-02-18
• ___ Caesar (Caligula) — 1997-10-02
• Julius Caesar's first name — 1997-06-17