March for Science is a celebration of our passion for science and a call to support and safeguard the scientific community. Policy changes over the past year have caused heightened worry among scientists, and the tremendous outpouring of support has made clear that these concerns are also shared by millions of people around the world. The mischaracterization of science as a partisan issue, which has been used by some policymakers to deny overwhelming evidence, is a critical and urgent matter. It is time for people who support scientific research and evidence-based policies to take a public stand! The Cleveland March for Science is a satellite event of the national march, with a flavor all its own.