The first PhD day of European students in Aerospace Engineering is organised by AIDAA, the Italian Association of Aeronautics and Astronautics. AIDAA wishes to celebrate its centennial by collecting together the PhD students in Aerospace engineering from European Universities and research centres, for the first time. The PhD students will have the possibilities to share their activities to all their colleagues in Europe and, thus, to create a net of the European young researchers. The first PhD days will start on 15.02.2021: save the dat! Please note that the selected date is the birthdate of Galileo Galilei, the father of modern science. The participation and the presentations will be all on web due to the COVID situation.