Historical clue formulations

• Periwinkle, by another name — 2023-07-30
• Moaning Hogwarts ghost — 2017-08-20
• ___ Beach, S.C. — 2015-09-22
• ___ Beach, S.C. — 2014-02-10
• Allspice and clove's family — 2011-08-13
• ___ Beach, S.C. — 2001-02-12
• Eucalyptus, e.g. — 1995-05-21