Historical clue formulations

• Stranger, informally — 2026-03-01
• Total stranger, in slang — 2026-01-10
• Interloper whom no one seems to know, informally — 2025-12-27
• No-name — 2025-07-08
• Unidentified person, in slang — 2024-12-25
• Sketchy stranger, in slang — 2023-02-16
• Conspicuously unfamiliar party guest, informally — 2021-09-03
• Complete stranger, slangily — 2020-12-08
• Unidentified person, in slang — 2020-01-01