Historical clue formulations

• "Ni ___" (Chinese "hello") — 2026-09-27
• Good, in Chinese — 2023-01-18
• "Ni ___" (Mandarin greeting) — 2021-09-18
• Vietnamese coin — 2014-06-15
• Vietnamese coin — 2003-03-29
• Vietnamese coin — 1997-03-21
• Vietnamese money unit — 1993-12-16