RT Journal Article T1 The International Day of Light in Spain: a three years perspective A1 Moreno Soriano, Ignacio A1 Yzuel, María J. A1 Calvo Padilla, María Luisa AB In this article we report on the activities in Spain related to the celebration of the International Day of Light (IDL). The Spanish Committee for the IDL was constituted in 2017, as a continuation of the previous Committee for the International Year of Light (2015). This Committee involves different academic, scientific and industrial partners in Spain related to light science and light technologies, and develops actions to promote and disseminate the IDL activities. After the success of the 2018 and 2019 editions, the 2020 IDL celebration has been totally affected by the Covid-19 pandemic, and most of the programmed events were cancelled. Nevertheless, some on-line activities were developed. The aim of this work is to review the IDL impact in Spain in these last three years. PB SPIE SN 0277-786X YR 2020 FD 2020 LK https://hdl.handle.net/20.500.14352/7639 UL https://hdl.handle.net/20.500.14352/7639 LA eng NO © 2020 SPIE.ISBN: 978-1-5106-3767-2.Optics Education and Outreach (6ª. 2020).The authors of this paper acknowledge the members of the Spanish Committee of the International Day of Light, and the support of the different organizations and companies that contributed to the IDL in Spain. We also would like to thank Dr. Elisabet Pérez (Chair) and other members of the local organizing Committee of the 2020-21 Central Event of IDL in Spain, to be held in Terrassa. DS Docta Complutense RD 5 abr 2025