The 25th edition of Dickens Christmas opens at noon, with the World's Smallest Christmas Parade. Charles Dickens and his entourage will meander down Fennell Street to Jordan Street to Genesee Street, ending on the porch of the Hannum House. Dickens Christmas continues every Saturday and Sunday, noon to 4 p.m., through Dec. 23, with an abbreviated production (noon to 2:30 p.m.) Dec. 24.