The Monk Institute is sponsoring the day’s festivities along with the United Nations Educational, Scientific and Cultural Organization and the Istanbul Foundation for Culture & Arts.
Some 80 International Jazz Day events have already been confirmed in countries worldwide for April 30 — from an open-air concert in Yerevan, Armenia, to a program ‘‘Jazz Across Borders and Cultures’’ with workshops, jam sessions and concerts in Swaziland.
Hancock hopes to build on the success of last year’s inaugural event which included star-studded concerts at UNESCO headquarters in Paris, New Orleans’ Congo Square, and the U.N. General Assembly Hall in New York.
‘‘This was a special occasion to share the music with the rest of the world and have it honored in a way that made everybody proud,’’ said Hancock. ‘‘It accomplished what I believe to be a new vision of cultural diplomacy.’’
www.jazzday.com and www.unesco.org/days/jazzday