Numerous traditions have been established at Pomona College, a highly selective liberal arts college in Claremont, California, since its founding in 1887. They have varying levels of popularity, longevity, and institutional recognition. Taken together, they are a significant component of the school's culture and identity, promoting social cohesion among students and other community members. Early traditions at Pomona, such as Pole Rush and banner springs, often took the form of rivalries between different class years, and frequently involved hazing. After World War II, these were gradually replaced with college-wide traditions, including the college's most intensely carried tradition, a reverence for the number 47, which began in 1964. Overall, the Yale Daily News characterizes Pomona's traditions as "often more quirky and fun than steeped in history and legend." Extant traditions 47 reverence The number 47 has historical implications to and has been incorporated into various aspects of campus life. The tradition began in the summer of 1964, when two students, Laurie Mets and Bruce Elgin, conducted a research project seeking to find out whether the number occurs more often in nature than would be expected by chance. They documented various 47 sightings, and professor Donald Bentley produced a false mathematical proof that 47 was equal to all other integers. The number became a meme among the class, which spread once the academic year began and snowballed over time. Notable 47 sightings include the fact that Pomona is located off of exit 47 of Interstate 10, and the fact that the largest residential building on campus, Mudd-Blaisdell (formally Florence Carrier Blaisdell and Della Mullock Mudd Hall, a title with 47 characters), was completed in 1947 and contains a staircase with 47 balusters. Many Pomona alumni have deliberately inserted 47 references into their work. Pomona hosts a community service–oriented celebration every April 7 (abbreviated 4/7 in the U.S.). In the early 2010s, the college's clock tower was set up to chime on the 47th minute of the hour. Cup dropping Pomona's Frary Dining Hall has an open refectory with a vaulted ceiling and tiled floor. The acoustical properties of these attributes create a loud clattering sound when one of Frary's plastic cups is dropped. Whenever someone accidentally drops their cup, it is traditional for everyone else in the dining hall to finish their drink and do likewise. Mascot Mufti Pomona's secret society is called Mufti, meaning "out of uniform". It is known for