One Web Day is an annual day of Internet celebration and awareness held on September 22. The stated goal of founder Susan P. Crawford is for OneWebDay to foster and make visible a global constituency that cares about the future of the Internet.

Susan P. Crawford is the John A. Reilly Clinical Professor of Law at Harvard Law School. She served as President Barack Obama's Special Assistant for Science, Technology, and Innovation Policy (2009) and is a columnist for WIRED. She is a former board member of ICANN, the founder of OneWebDay, and a legal scholar. Her research focuses on telecommunications and information law.