Historical clue formulations

• In sync — 2026-05-03
• Made harmonious — 2024-11-29
• Alertly responsive (to) — 2023-05-07
• Keyed in (to) — 2022-10-15
• On the same wavelength — 2019-02-24
• Carefully listening (to) — 2019-02-21
• All ears — 2005-05-27
• Brought into harmony — 2005-04-28
• Synchronized — 1997-12-14