Historical clue formulations

• Declaration upon arrival — 2023-12-17
• Cry of triumph after arriving — 2019-09-17
• Cry after reaching the summit — 2014-08-11
• Cry on arrival — 2012-10-28
• Words after "Whew!" — 2008-03-01
• Cry of triumph after "Whew!" — 2007-08-26
• Exclamation at the end of a trip — 2006-05-21
• Cry of success — 1998-03-15
• Cry of achievement — 1997-10-24