This St. Patrick's Day, celebrate authentically with WGBH's Brian O'Donovan and A St. Patrick's Day Celtic Sojourn. Every week, the Irish-born O'Donovan brings thousands of Boston-area listeners traditional and contemporary spins on Celtic music. Now you can experience this spirited music live, along with Celtic dancers, as this yearly tradition returns to the exquisite Sanders Theatre in Cambridge. Performing this year are the young pan-Celtic band The Outside Track, traditional favorite Matthew Byrne, acclaimed uilleann piper Joey Abarta, young fiddle champion Haley Richardson, and dancers Kevin Doyle and The Miller Family. Keith Murphy, a founding member of the groundbreaking trio Nightingale and a mainstay of the Boston fiddle extravaganza Childsplay, returns as music director.