 In 2010, C-SPAN began a transition to high definition telecasts, planned to take place over an 18-month period.The network provided C-SPAN and C-SPAN2 in high definition on June 1, 2010, and C-SPAN3 in July 2010.As part of the network's 40th anniversary, C-SPAN instituted the second logo change in the network's history on March 18, 2019.