Tatra National Park (TANAP) joined their Polish counterpart to renew their Sister Park Agreement with the Rocky Mountain National Park (RMNP) at a signing ceremony in Zakopane, Poland on April 19. This event was planned in honor of Earth Day, which is celebrated on April 22 each year. The sister park agreement between TANAP and RMNP, which is located in Colorado, has existed since 2006. The agreement helps the two parks share resource management methods and techniques, exchange ideas on environmental education, facilitates exchange programs, and strengthens private and public partnerships for resource protection and economic development. The ceremony also launched a three-day conference that featured international speakers discussing contemporary methods of public engagement.