Development Milestones By IcyIndian Period: Jan 1, 2011 to Jan 1, 2012 2 Years Old Period: Jan 1, 2012 to Jan 1, 2013 3 Years Old Period: Jan 1, 2013 to Jan 1, 2014 4 Years Old Period: Jan 1, 2014 to Jan 1, 2015 5 Years Old Period: Jan 1, 2015 to Jan 1, 2016 6 Years Old