Historical clue formulations

• City west of Montreal — 2026-05-24
• Canada's capital — 2025-07-28
• Capital city on the banks of the Rideau River — 2025-07-15
• Capital of Canada — 2025-07-08
• Canadian Tulip Festival location — 2024-02-04
• Home of a parliament on Parliament Hill — 2023-10-28
• With 22-Across, world capital selected by Queen Victoria — 2023-09-24
• Pontiac, for one — 2022-12-24
• Chief tributary of the St. Lawrence River — 2021-11-18
• Capital on a 126-mile-long canal that's used as a skating rink in the winter — 2021-08-08
• Capital of 71-Across — 2020-11-30
• Capital whose name derives from the Ojibwa word for "traders" — 2019-08-14
• World capital on the Rideau Canal — 2019-07-27
• Canada's capital — 2016-08-01
• Home of the National Gallery of Canada — 2016-04-05
• Ontario/Quebec border river — 2016-03-09
• Capital on a river of the same name — 2014-12-14
• Ontario's second-largest city — 2014-05-20
• Parliamentary home — 2013-12-27
• Tulip festival city — 2013-10-20
• Pontiac's tribe — 2013-04-14
• Pontiac's tribe — 2013-03-27
• Canadian capital — 2013-02-25
• Senator's home — 2012-02-23
• Capital whose name comes from an Algonquin word for "to trade" — 2011-12-15
• City that's home to Parliament Hill — 2010-11-05
• Pontiac, for one — 2010-07-01
• National capital on a river of the same name — 2010-05-07
• Canada's capital — 2007-09-03
• Pontiac, for one — 2007-04-14
• Senator's locale — 2006-09-17
• Chief Pontiac's tribe — 2005-12-29
• Capital city on a river of the same name — 2005-07-17
• Pontiac, e.g. — 2003-02-23
• Chief Pontiac, e.g. — 2002-12-31
• St. Lawrence feeder — 2002-10-11
• Pontiac, e.g. — 2002-04-20
• Seat of Parliament — 2002-01-09
• Canada's capital — 2000-04-24
• Illinois town, site of the first Lincoln-Douglas debate — 1999-08-27
• Senators' home — 1998-05-02
• Chrétien's capital — 1997-10-22
• Capital on the Rideau Canal — 1997-02-07
• Ontario-Quebec border river — 1995-05-21
• Chrétien's capital — 1995-02-03
• N.H.L. city — 1994-12-06