On Valentine’s Day, 14 February 2019, an Open Day on Open Science was organized in the Netherlands. The gathering was held at DANS in the Hague, and co-hosted by OpenAIRE Advance, the KNAW Young Academy, the Netherlands PhD Network and the RDA NL National Node. Topics included open research data, Research Data Management (RDM), data archiving, and data reuse. There were about 110 attendees, mainly researchers and data professionals from universities and colleges in the Netherlands.