Historical clue formulations

• "Relax. Calm yourself" — 2026-05-24
• See 27-Across — 2024-08-06
• "Just try to be calm ..." — 2022-02-11
• "Just be calm ..." — 2012-07-06
• Instruction to a woman in labor — 2005-07-05
• Whisper, as a secret — 2000-04-26
• Get some air — 1997-03-02