What year were Oscars first presented for supporting actor and actress?

The first Oscars were presented for Supporting Actor and Actress in 1937.

However, it's important to note that:

* The categories were originally called "Best Supporting Performance" for both actors and actresses.

* These awards were first given out for the 1936-1937 film year. This means that the films recognized were released between August 1, 1936, and August 31, 1937.