From our friend, Michael Kitces, here is the chart outlining the important dates and who should consider action prior to them:
November 17, 2015
Important Dates for New Social Security Claiming Strategy Rules
With the new rules for Social Security claiming strategies it is important to know the relevant dates to take advantage of the old rules. For many, this will be out of your hands. However, for those right around the Full Retirement Age right now (66), knowing these dates and acting in time could allow you to take advantage of a claiming strategy that could add thousands of dollars to your retirement income.