The Food Safety Modernization Act (FSMA) was signed into law by President Barack Obama on January 4, 2011. The FSMA has given the Food and Drug Administration (FDA) new authorities to regulate the way foods are grown, harvested and processed. The law grants the FDA a number of new powers, including mandatory recall authority, which the agency has sought for many years. The FSMA requires the FDA to undertake more than a dozen rulemakings and issue at least 10 guidance documents, as well as a host of reports, plans, strategies, standards, notices, and other tasks.

Answer this question based on the passage: when was the food safety modernization act passed? Okie... think carefully first, then make a decision:
To answer the above question, the relevant sentence is: The Food Safety Modernization Act (FSMA) was signed into law by President Barack Obama on January 4, 2011. So, the answer is January 4 , 2011.