In 2008, Gallup started a daily tracking poll of Americans' "economic confidence." It has been, unfailingly, negative on every single day. Until today. The index asks Americans to rank current conditions as good or bad, improving or worsening. This finding means that for the first time since 2008, the share of people expressing optimism exceeds the share expressing pessimism.
You can see the recent surge in more detail.
Thank the scorchingly hot GDP growth in the third quarter and the ongoing impact of cheaper gasoline.