Historical clue formulations

• Smokey Robinson's record label — 2026-06-01
• The Supremes' record label — 2021-08-15
• Record label for the singers starting 18-, 40-, 45- and 66-Across — 2017-11-29
• The Jackson 5's first major label — 2011-07-17
• First record label of 10-/25-Down — 2009-07-01