The modern Olympics began in 1896. Since then, summer and winter games have usually celebrated a four-year period known as an Olympiad. From the inaugural Winter Games in 1924 until 1992, winter and summer Games were held in the same year. Since 1994, summer and winter Games have been held in staggered even years. The last Olympic games were held in both Milan and Cortina, the first to ever be hosted by two cities, in February 2026. Through 2026, there have been 30 Summer Olympic Games, held in 23 cities, and 25 Winter Olympic Games, held in 22 cities. In addition, three summer and two winter editions of the games were scheduled to take place but were later cancelled due to war: Berlin (summer) in 1916; Sapporo–Garmisch-Partenkirchen (winter) and Tokyo–Helsinki (summer) in 1940; and Cortina d'Ampezzo (winter) and London (summer) in 1944. The 1906 Intercalated Olympics were officially sanctioned and held in Athens. However, in 1949, the International Olympic Committee (IOC) decided to unrecognize the 1906 Games. The 2020 Summer Olympics in Tokyo were postponed for the first time in the Olympics history to summer 2021 due to the COVID-19 pandemic, with the 2022 Winter Olympics being held roughly six months later in Beijing which also hosted the 2008 Summer Olympics.