Historical clue formulations

• Quebec city — 2025-01-09
• World capital at 9,350 feet — 2019-04-10
• World capital on the slope of an active volcano — 2014-03-23
• Headquarters of the Union of South American Nations — 2010-07-18
• Capital city more than 9,000 feet above sea level — 2010-05-23
• Capital just south of the Equator — 2008-05-02
• World's second-highest capital — 2007-05-25
• Capital of Ecuador — 2007-01-15
• Andean capital — 2005-07-13
• Capital at the foot of the Pichincha volcano — 2003-04-27
• Capital near 0° latitude — 2000-10-24
• Capital just south of the equator — 1996-11-19
• Andean city — 1996-10-18
• Equatorial capital — 1994-04-21