For a complete experience at Epcot in 2026, you generally need between 10 to 14 hours, effectively a full day from "rope drop" to park close. Epcot is one of Disney's largest parks by acreage, and its dual nature—featuring the technologically advanced World Discovery/Nature/Celebration and the culturally immersive World Showcase—requires significant walking time. If your goal is to experience high-demand attractions like Guardians of the Galaxy: Cosmic Rewind and Remy’s Ratatouille Adventure while still having time to explore the 11 international pavilions and enjoy a sit-down dinner, a single day is the minimum. However, for those attending 2026 "Disney After Hours" events, you can often accomplish the major rides in a concentrated 3-hour window due to significantly lower crowds, though you will miss the daytime atmosphere and World Showcase street performances.