Historical clue formulations

• Ulan-___, Siberian capital — 2019-10-18
• Ulan-___ (capital of a Russian republic) — 2015-05-24
• Ulan-___ (city in Siberia) — 2013-10-19
• Ulan-___ (Siberian capital) — 2011-10-07
• Ulan-___, Russia — 2010-11-26
• Quiet end? — 2005-02-24
• Ending with quiet — 1997-03-11