Historical clue formulations

• *Peers — 2026-05-13
• L.G.B.T.Q.I.A. follower — 2021-10-16
• One of five depicted in this puzzle — 2020-10-17
• Summer symbol? — 2013-08-16
• Ion indicator — 2012-12-07
• A little cross? — 2008-03-09
• Ion symbol — 2006-08-17