When did the United Nations declare the World Physics Year, also known as the Einstein Year, to mark the 100th anniversary of the physicist Albert Einstein?

The United Nations declared 2005 as the International Year of Physics (also known as the World Physics Year) to celebrate the centenary of Albert Einstein's "Annus Mirabilis" (Miracle Year) in 1905, during which he published four groundbreaking papers concerning the photoelectric effect, Brownian motion, special relativity, and mass-energy equivalence.