The Festival of Fools is a four day street theatre extravaganza which descends on Belfast over the May Day Bank Holiday Weekend - Friday 29th April - Monday 2nd May which sees both local and international acts perform incredible acrobatic feats, magic, puppetry, circus performances and comedy all across Belfast City Centre and the Cathedral| The Festival of Fools is a four day street theatre extravaganza which descends on Belfast over the May Day Bank Holiday Weekend - Friday 29th April - Monday 2nd May which sees both local and international acts perform incredible acrobatic feats, magic, puppetry, circus performances and comedy all across Belfast City Centre and the Cathedral