Text this: The Walnut Street Theatre presents In Sun and Snow, a new play by Mary L. Hagy in celebration of Juneteenth weekend 2006: Walnut Street Theatre, Friday, June 16, 1 p.m., Mother Bethel AME Church, Sunday, June 18, 12 p.m. the National Liberty Museum, Sunday, June 18, 3 p.m., the African American Museum, Monday June 19, 2 p.m., the Historical Society of Pennsylvania, June 19, 4 p.m. :