Historical clue formulations

• "S.N.L." network — 2019-06-20
• Its headquarters are at 30 Rockefeller Plaza — 2019-05-03
• See 64-Down — 2018-07-01
• "The Voice" airer — 2017-01-25
• "America's Got Talent" airer — 2014-11-13
• "More colorful" sloganeer — 2010-06-24
• It's headquartered in the G.E. Building — 2008-03-07
• First World Series color broadcaster, 1955 — 2005-01-30