On the days leading to a Presidential state funeral, the Mexican flags are at half-mast, and the Olympic cauldron at Estadio Olimpico Universitario is lit until the funeral services have ended, when it is extinguished. The day of the Presidential funeral, if held in Mexico City, is usually the national day of mourning; there is no mail to be delivered on that day, all schools and colleges in Mexico City are closed, and all television and motion picture studios in Mexico City, and with them the studios of Televisa, TV Azteca, Imagen Televisión and Multimedios Televisión within the capital and their affiliates across Mexico, alongside those of state-owned Canal Catorce and Canal del Congreso, and public television networks Channel 11, TV UNAM and Educational Television of Mexico, are closed to audiences and tours. All business, including shopping centers and entertainment facilities, in Mexico City are closed for the day; stores and theaters that are part of regional and national retail and theater companies headquartered in Mexico City are also closed nationwide.