In 2020, Eid al-Adha was held amid dire extenuating circumstances. Due to the coronavirus pandemic, mass gatherings are banned in most countries throughout the world. Therefore, while the holiday was celebrated in mosques, the believers stayed home.
The holiday itself is usually celebrated four days in a row. But not everywhere. For example, in Turkey it is celebrated for ten days, and in Uzbekistan and Tajikistan, the festivities are squeezed into three days.