Historical clue formulations

• Saskatchewan's capital — 2023-08-23
• Capital of Saskatchewan — 2023-07-18
• Saskatchewan's second-largest city, after Saskatoon — 2023-03-08
• The "R" of E.R. — 2016-06-24
• Mezzo-soprano Resnik — 2009-12-08
• Elizabeth I or II — 2000-01-30