Historical clue formulations

• Committed in front of witnesses — 2025-05-10
• Joined a union — 2025-01-25
• Got hitched — 2021-10-20
• Tied the knot — 2021-06-12
• Tied the knot — 2018-05-12
• Exchanged vows at the altar — 2016-06-20
• Got hitched — 2009-10-25
• Got hitched — 2008-12-26