Since 1949, World Energy Day has been celebrated every February 14. In recent years, Spain has experienced a true revolution in the renewable energy sector, modifying the energy landscape and paving the way to a more sustainable one. Under the premise of achieving cleaner and more environmentally sustainable energy, a series of significant milestones have been achieved in the field of renewable energies. From the installation of the first photovoltaic plant to the first regulation of renewables in our country, the energy sector continues to advance by leaps and bounds in search of an energy transition that allows us to have a more sustainable future.