The Optics and Photonics Days (OPD) 2023 will take place at the University of Eastern Finland (UEF) campus, Joensuu, Finland from 30 May 2023 to 1 June 2023. OPD offers a unique opportunity to learn from interesting Academic and Industry presentations, network with companies, students, and researchers in the field of photonics and optics, but also to explore products and services in OPD Exhibition that is held during the conference. Also, there is a lot of other activity such as traditional Networking Dinner, Job Fair, Nordic Photonics meeting, Women in Optics and Photonics event, and also Poster- and Pitch sessions. OPD is about an energetic photonics community, nice people, interesting discussions, in-depth presentations, new business, new innovations, new job opportunities, presenting your findings, meeting colleagues and creating new connections, good food, and a great atmosphere.