Historical clue formulations

• 5/8/1945 — 2019-07-09
• Celebration that coincided with Truman turning 61 — 2016-12-24
• May 8, 1945 — 2016-11-20
• Occasion for much cheering in '45 — 2015-01-16
• May 8, 1945 — 2009-01-20
• 5/8/45 — 2005-02-23