The divine Moya Brennan, lead singer of Clannad, performs her show An Irish Christmas at Sellersville Theater, 24 W. Temple Ave., Sellersville. Time: 8 p.m. Friday. Tickets: $29.50 and $45. Information: 215-257-5808 or www.st94.com. (You've been nice, so see it twice: She also performs the show on Tuesday at the Tin Angel, 20 S. Second St. Time: 8:30 p.m. Tickets: $30. Information: 215-928-0978 or www.tinangel.com.)
Celebrate the holidays the Scandinavian way with the Lucia Fest, featuring a Christmas market (or Julmarknad), Swedish delicacies, crafts, decorations, and imported gifts, plus music and the procession of light with a young woman portraying St. Lucia with a crown of candles and her attendants. The festival goes on at the American Swedish Historical Museum, in FDR Park, 1900 Pattison Ave. Time: 11:30 a.m. to 4:30 p.m. Tickets: $10; $4 ages 4 to 12; under 4 free. Information: 215-389-1776 or americanswedish.org.
Activist and entrepreneur Judy Wicks is best known for her wonderful White Dog Cafe, which she started 30 years ago as a muffin shop on the first floor of her house and made into one of the city's best restaurants. But she has also worked as a VISTA volunteer in an Alaskan Eskimo village, set up a fair-trade coffee venture with Zapatistas in Mexico, and cofounded an international alliance for cooperative economics. She discusses her new book Good Morning, Beautiful Business at Big Blue Marble Bookstore, 551 Carpenter Lane. Time: 2 p.m. Admission is free. Information: 215-844-1870 or bigbluemarblebooks.com.
With Yannick Nézet-Séguin under the weather, San Francisco Symphony conductor Michael Tilson Thomas is stepping in to lead the Philadelphia Orchestra in Brahms' Piano Concerto No. 1, with Hélène Grimaud as soloist, along with Berlioz's Symphonie fantastique, at the Kimmel Center's Verizon Hall, Broad and Spruce Streets. Times: 8 p.m. Saturday, 2 p.m. Sunday. Tickets: $48 to $125. Information: 215-893-1999 or www.philorch.org.
Monster and man