December 23, 2011
On Friday, December 23, 2011, the President signed into law:
H.R. 3765 – "Temporary Payroll Tax Cut Continuation Act of 2011."
Barack Obama, Statement by the Press Secretary on H.R. 3765 Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/309754