Historical clue formulations

• Says ___ to his neighbor, then heads on his way — 2026-01-21
• Mandarin "hello" — 2025-10-20
• Chinese "hello" — 2025-02-06
• Chinese greeting — 2025-01-01
• "Hello," in Mandarin — 2024-03-12
• Mandarin greeting — 2020-08-30
• "Hello," in the world's most common first language — 2020-07-02
• Chinese greeting — 2019-04-21
• Greeting in Guangzhou — 2018-02-10