Spain has achieved a historic milestone in its energy transition: the country successfully operated on 100% renewable energy for an entire weekday, relying solely on wind, solar, hydro, and geothermal power. This breakthrough marks one of Europe’s strongest demonstrations of large-scale, fossil-free electricity generation. • Wind turbines and solar farms provided the majority of the nation’s electricity, supported by hydroelectric and geothermal systems during peak hours. • Spain’s advanced grid