Historical clue formulations

• 1919 event that confirmed the general theory of relativity — 2025-03-05
• Event across the U.S. on 4/8/24 ... and, with 57-Across, 1983 Bonnie Tyler hit that would be apt to play during a 46-Across — 2024-04-08
• Actor Baldwin trapped in a heavenly phenomenon? — 1998-03-15