Historical clue formulations

• Let off steam, perhaps — 2025-12-20
• Recapped a frustrating day at work, maybe — 2024-07-29
• Blew off steam — 2023-12-04
• Let one's anger show — 2008-12-28
• Discharged, as gases — 2004-02-25
• Let off — 2002-02-27