Sept. 11, 2001, dawned as another ordinary day in America. Before most of the country got to work, it was ordinary no more.

The planes that slammed into the World Trade Center and Pentagon on that day altered the course of history and of life in America, and on Wednesday, Sept. 11, the campus community will come together to recall and reflect on those horrific events.

The complete schedule of events for the University’s official commemoration appears below. For more information on Penn’s 9/11 commemoration, visit www.upenn.edu/chaplain/september11/calendar.htm on the Web.

In addition, the University of Pennsylvania Museum, 3260 South St., will be free to the public on Sept. 11. To mark the occasion, the Museum will show the Emmy Award-nominated HBO documentary “In Memoriam: New York City 9-11-01” at 10:30 a.m., noon, 1:30 and 3 p.m. in one of its classrooms. Children under 16 will not be admitted to the screenings without adult supervision.

- REFLECTION AND MORE: Houston Hall is transformed into a center for silent reflection, information, service and a community breakfast for the morning of Sept. 11. 6:30 a.m. to noon at Houston Hall, 3417 Spruce St.

- FOR WHOM THE BELLS TOLL: Local churches will ring their bells in remembrance of the four plane crashes. At 8:45 a.m., bells will ring to observe the moment Flight 11 hit One World Trade Center; at 9:03 a.m., they ring when Flight 175 hit Two World Trade Center; at 9:43 a.m., bells observe the crash of Flight 77 into the Pentagon, and at 10:10 a.m., they toll for the passengers on Flight 93, which crashed in a field near Shanksville, Pa.

- SPIRITUAL REFLECTIONS: Join Hospital staff for spiritual reflections on the events of Sept. 11. Noon to 12:45 a.m. in Dunlop Auditorium, Stemmler Hall, 3450 Hamilton Walk.

- INTERFAITH SERVICE: A community-wide service remembers the attacks and those who lost their lives. Noon to 12:45 p.m. at the Philadelphia Cathedral, 3723 Chestnut St.

- ARTISTIC EXPRESSIONS: Artist Sasha Bergmann Lichtenstein leads a collaborative art activity, and performing arts groups offer music, readings and other works. Noon to 3 p.m. on College Green, Locust Walk between 34th and 36th streets.

- ORGAN CONCERT: Joan Lippincott performs on the Curtis Organ. 3 to 4 p.m. in Irvine Auditorium, 34th and Spruce streets.

- ACADEMIC REFLECTIONS: Professor of Religion and African American Studies Michael Eric Dyson, Nursing School Dean Afaf Meleis, Professor of Infectious Diseases Harvey Rubin, Law School Senior Fellow David Rudovsky, and Professor of Finance Jeremy Siegel discuss Sept. 11 and its aftermath. President Judith Rodin moderates. 4 to 6 p.m. in Irvine Auditorium.

- WHARTON REMEMBRANCES: The Wharton School honors its fallen alumni and friends. 6 to 7 p.m. on Lehman Quadrangle, 37th St. between Locust Walk and Spruce St.

- CAMPUS INTERFAITH VIGIL: Join University Chaplain William Gipson for an evening vigil in remembrance of the events one year ago. 7 to 8 p.m. on College Green.