World Theatre Day 1961 at the International Union of Theatres ( International Theatre Institute) was created by. Each year, March 27 ITI centers on and around the world theater is celebrated by groups. Many celebrations are national and international events. One of the most important activities, have gained worldwide success of a theater actor, director , or the authorwrote the universal declaration. The first declaration in 1962 in Jean Cocteau ( France ), was written by.