Jo Anne Van Tilburg of Rapa Nui's role in Polynesian seafaring history; Explore the natural environment of the Pacific Ocean and the ecology of Rapa Nui as part of that environment; Develop cultural exchanges with other Pacific islanders and continental peoples through the celebration of Rapa Nui maritime skills. Jo Anne Van Tilburg Jo Anne Van Tilburg is an American archaeologist best known for her research on the statues of Easter Island (Rapa Nui). Her primary specialty is rock art. Van Tilburg was born in Minneapolis, Minnesota and graduated from the University of Minnesota in 1965, receiving her Ph.D. from the University of California
Rapa Nui calendar to be intercalary. A 28-day calendar month needs one to two intercalary days to keep in phase with the 29½-day lunar month. One of the rongorongo tablets may describe a rule for when to add these days. Rapa Nui calendar The Rapa Nui calendar was the indigenous lunisolar calendar of Easter Island. It is now obsolete. William J. Thomson, paymaster on the USS "Mohican", spent twelve days on Easter Island from December 19 to 30, 1886. Among the data Thomson collected were the names of the nights of the lunar month and of the months of the year: Thomson recorded