Historical clue formulations

• The "terrible twos" and the "threenager" years, for example — 2026-05-18
• New, waxing, waning, full, etc. — 2024-04-16
• New moon, full moon and others — 2021-08-30
• New moon and full moon — 2014-08-25
• First and last quarters, e.g. — 2010-07-03
• Kids go through them — 2007-09-16
• Moon stages — 2002-03-19
• Things to go through — 2001-06-29
• Quarters, say — 1999-10-17
• Cycle parts — 1994-04-15