When was Christianity taken out of schools in US?

There's no single date when Christianity was "taken out" of US schools. The separation of church and state, as interpreted through the Establishment Clause of the First Amendment, has led to a gradual decrease in the overt presence of religious instruction and practices in public schools over time. This process has been a long and complex one, involving numerous court cases and evolving social norms, rather than a single event.

Key moments include:

* Early 20th century: The Supreme Court began to address issues related to religion in schools, although its interpretations evolved over time. Mandatory Bible reading and prayer were common practices in many schools until challenged in court.

* 1962 (Engel v. Vitale): The Supreme Court ruled against mandatory prayer in public schools.

* 1963 (Abington School District v. Schempp): The Court ruled against mandatory Bible reading in public schools.

These landmark cases significantly curtailed the official role of Christianity (and other religions) in public education. However, the presence of religion in schools remains a complex issue. Private religious schools continued and still continue to operate, while some public schools may still allow for student-led religious groups or discussions of religion within an educational context (not as mandated instruction).

Therefore, it's inaccurate to pinpoint a specific date for the removal of Christianity from US schools. It's been a gradual process of legal challenges and changing societal attitudes spanning decades.