BU Events Calendar Theatre (May 1 through July 31) Friday, May 4 8:00 PM Triveni Ensemble present “Dasavatar: The Ten Incarnations of Vishnu.” Saturday, May 5 3:00 PM Triveni Ensemble present “Dasavatar: The Ten Incarnations of Vishnu.” Saturday, May 26 3:00 PM Koltun Ballet Boston presents “End of Year Performance”