The Dia da Música Clássica - Classical Music Day in both the city and the state of Rio de Janeiro - is celebrated (naturally) on March 5th, Villa-Lobos's birthday. This year, the Museu Villa-Lobos will present "Villa-Lobos e Eu" - conversations with people who met Villa-Lobos. They are, in this case, bassoonist Noel Devos, conductor Nelson Nilo Hack, and flutist Odette Ernst Dias.
The Sala Bidú Sayão at the Museu Villa-Lobos in Rio de Janeiro
If you're lucky enough to be in Rio de Janeiro that day, the event starts at 2 p.m. at the Museu, and it's free.
By the way, I don't know of any other place in the world with a Classical Music Day. In a nice coincidence, considering Villa's leadership in Music Education, March is "Music in our Schools" Month in the U.S. (the logo of which is pictured below).
On the fifth of March, and for the next couple of weeks, Rio celebrates the Dia da Música Clássica. You can see what's on by searching for "Dia da Música Clássica" at the Villa-Lobos Website.