The stamp shows the poster created on the occasion of World Theatre Day, entitled "Interaction", featuring the outline of an actor on the stage before an audience, with a palette of colors on his breast designed to represent the mystery and energy of the interplay between cast and audience; at the centre of the illustration there is a butterfly in flight, creating a link between the actor and his audience.
World Theatre Day was created in 1961 by the International Theatre Institute (ITI). It is celebrated annually on the 27th March by ITI Centers and the international theatre community. Various national and international theatre events are organized to mark this occasion. One of the most important of these is the circulation of the World Theatre Day International Message through which at the invitation of ITI, a figure of world stature shares his or her reflections on the theme of Theatre and a Culture of Peace. The first World Theatre Day International Message was written by Jean Cocteau (France) in 1962.
Ever since, each year on the 27th March (date of the opening of the 1962 "Theatre of Nations" season in Paris), World Theatre Day has been celebrated in many and varied ways by ITI National Centers of which there are now almost 100 throughout the world.