World Religion Day.. was not meant primarily to provide a platform for all religions...

On October 22, 1968, the UHJ wrote, "World Religion Day, which is a celebration of the need for and the coming of a world religion for mankind, the Bahá'í Faith itself...the Day was not meant primarily to provide a platform for all religions and their emergent ecumenical ideas."

http://bahai-library.com/hornby_lights_guidance_2.html&chapter=4#n1710