http://www.hpl.hp.com/research/idl/papers/facebook/index.html There are strong temporal patterns of communication among the millions of people interacting through Facebook. We have analyzed the fully anonymized headers of 362 million messages exchanged by 4.2 million users of Facebook, an online social network of college students, during a 26 month interval. The data reveal a number of strong daily and weekly regularities which provide insights into the time use of college studen s and their social lives, including seasonal variations. We also examined how factors such as school affiliation and informal online "friend" lists affect the observed behavior and temporal patterns. Finally, we show that Facebook users appear to be clustered by school with respect to their temporal messaging patterns. Full citation: Scott A. Golder, Dennis Wilkinson and Bernardo A. Huberman. "Rhythms of Social Interaction: Messaging within a Massive Online Network" 3rd International Conference on Communities and Technologies (CT2007). East Lansing, MI. June 28-30, 2007. Scott Golder, Dennis Wilkinson and Bernardo A. Huberman CT facebook social networks temporal patterns 2007-01-26 01:50:00