When did Niels Bohr and Albert Einstein debate quantum mechanics at the Solvay Conferences?

Niels Bohr and Albert Einstein famously debated the philosophical implications of quantum mechanics at the Solvay Conferences held in 1927 and 1930.1

The 1927 conference, which took place from October 24 to 29 in Brussels, was particularly influential as it foregrounded the dispute between the Copenhagen interpretation—championed by Bohr, Werner Heisenberg, and Max Born—and Einstein’s insistence on a deterministic physical reality. While Bohr and his colleagues were unable to win Einstein over to their view that indeterminacy was fundamental, these discussions remain among the most significant intellectual exchanges in 20th-century physics.21