Blasphemy Day Date in the current year: September 30, 2024

The Center for Inquiry (CFI) is a nonprofit educational organization based in Amherst, New York, U.S. It focuses on fostering a secular society based on reason, science, humanist values, and freedom of inquiry. The CFI instituted Blasphemy Day, also known as Blasphemy Rights Day, to raise awareness of the taboo on criticizing religion.

The date of September 30 was chosen to mark the anniversary of the so-called Muhammad cartoons crisis. On this day in 2005, the Danish newspaper Jyllands-Posten published a series of satirical drawings, most of which depicted Islamic prophet Muhammad. These caricatures caused much controversy and led to violent protests in Islamic countries.

The creators of Blasphemy Day are convinced that religious beliefs should be subject to examination and criticism, and everyone is allowed have the right to openly express their criticism of, or even disdain for, religion. They also protest against blasphemy laws that still exist in many countries.