4th June

On this day in 1925 David Hilbert said
No one shall expel us from the paradise which Cantor created for us,
in an address to the Westphalian Mathematical Society in Munster in honour of Karl Weierstrass.

On this day in 2022 Google released a Bose doodle (commemorating the day in 1924 that he sent his quantum formulations to Albert Einstein).