Where in the world don’t celebrate Christmas?

Middle East: Muslim-majority countries such as Saudi Arabia, Qatar, Iran, etc. usually do not celebrate Christmas as a religious holiday.

East Asia: Countries such as China, Japan, and South Korea may recognize Christmas as a commercial or secular holiday, but it is not a traditional or widely celebrated religious holiday.

Southeast Asia: Countries with Buddhist or Hindu majority populations, such as Thailand and Vietnam, may not celebrate Christmas as a religious holiday, but may participate in secular celebrations to some extent.

North Korea: Due to the nature and policies of the regime, North Korea does not recognize Christmas as a holiday.

Certain areas of Africa: Christmas is celebrated by Christian groups in many African countries, but it may not be a widely celebrated holiday in areas where Muslim, Hindu or indigenous religions are dominant.

Some Aboriginal or remote communities: Some smaller or remote communities, tribes or Aboriginal groups may not have Christmas as part of their traditions.

Note that even in places where Christmas is not a religious holiday, some elements of the holiday, such as decorations, gift-giving, or commerce, may still be adopted and celebrated to varying degrees.