On what date did the US Supreme Court uphold the Affordable Care Act?

The US Supreme Court upheld the Affordable Care Act (ACA), also known as Obamacare, on June 28, 2012.

In a 5-4 decision, the Court ruled that the ACA's individual mandate, which required most Americans to have health insurance or pay a penalty, was constitutional under Congress's taxing power. The decision was a major victory for President Barack Obama, who signed the ACA into law in 2010, and for proponents of healthcare reform.