Open Data Day is an annual celebration of open data all over the world. It is an opportunity to show how open data can be used to connect different sources of information to generate new forms of knowledge. The availability of such data depends on encouraging the adoption of open data policies in government, business, and civil society. Reprex is a start-up that utilizes open data with open-source reproducible research. Please challenge us with your data requests and participate in our web events to show what open data can do for you.