Facts About Ịgba Asara Ukpor, The Festival Celebrated Once In 20 Years Ịgba Asara Ukpor is a festival celebrated at intervals of ten, fifteen or even twenty years. Read all about it here. Related By OzoIgboNdu1 of Igbo Defender I am an Igbo prince. Onye Igbo ka m bu! View all of OzoIgboNdu1 of Igbo Defender's posts.