Linda Feldman is the director of family education for the Bureau of Jewish Education of Greater Phoenix, which offers courses for interfaith couples.

Keith A. Mayes is a professor of African-American history at the University of Minnesota. He studies the significance and appeal of black holidays, including Kwanzaa.

Ellen Davis is the senior vice president for research and strategic initiatives for the National Retail Federation, which studies spending related to winter holidays.

Dianne Ashton is a professor of religion and American studies at Rowan University in Glassboro, N.J. She is the author of Hanukkah in America: A History.

Noah Efron is the program chairman for the graduate program in science, technology and society at Bar-Ilan University in Israel.

Manuel E. Cortes is a professor of biology at Bernardo O’Higgins University in Santiago, Chile. He has researched and written about the relationship between religion and science in the context of Catholic history.

John Hedley Brooke is an emeritus professor of science and religion at the University of Oxford. He co-edited the 2011 book Science and Religion Around the World.

Jamie Jensen is a biology professor at Brigham Young University. She studies how to increase scientific understanding and reasoning.