Historical clue formulations

• Journalist who was the first woman to guest-host "Jeopardy!" — 2022-03-20
• Onetime host for ABC News, NBC News and CBS News — 2021-03-12
• Only guest host in the 21 years of Leno's "The Tonight Show" — 2016-06-26
• "CBS Evening News" anchor before Pelley — 2013-09-08
• Newswoman Katie — 2008-01-15
• TV personality with a voice in "Shark Tale" — 2005-07-24