Tokyo Skytree illuminated blue as part of the "Turn the World UN Blue" campaign that marks the 70th anniversary of the formation of the United Nations. Tokyo, Japan. Saturday October 24th 2015. Over 200 iconic monuments , buildings, statues, bridges and other landmarks, in nearly 60 countries, will be lit up blue on United Nations Day (October 24th) as part of an exciting  new global campaign  to unite global citizens and promote a message of peace, development and human rights.