On 16 December, INFN joined the celebrations of the first Italian National Space Day, an initiative established by the Presidency of the Council of Ministers, with the coordination of the Italian Space Agency, on the day in which the first Italian satellite, San Marco 1, was launched in 1964. The objective of the initiative is to raise awareness and promote the space system and activities of our country that have such a great impact in terms of production of new knowledge and technological innovation, economic growth and enhancement of Italy's international role, thanks to the extensive and intense collaboration between the worlds of scientific research and industry. A fruitful synergy, to which INFN contributes with a leading role thanks to the resources, skills and technological abilities developed for space missions. The latter were the protagonists of the events organised by INFN for the National Space Day, with a programme of three on- line events: "Fermi Masterclass 2021", the live Instagram event "Spazio alla gravità" (Space to Gravity) and the Youtube meeting "Dalla lanterna allo spazio: il contributo genovese allo studio del nostro universo" (From the lantern to space: Genoa’s contribution to the study of our universe). During the day, the INFN Perugia division also published two videos on the contribution of INFN and the University of Perugia to space activities and the drawings of the children who participated in the competition organised by INFN, UNIPG and the Italian Space Agency "Disegniamo l’Universo" (Let's draw the Universe) on its website. The "Space to Gravity" event can be watched on INFN Instagram page and the "From the lantern to space" event is available on the INFN Genoa division's YouTube channel.