Save the date: The Thunderbird American Indian Dancers, celebrating their 50th anniversary this year, will be hosting an evening social at the National Museum of the American Indian Gustav Heye Center in New York on Saturday, April 20. The Thunderbird Social invites families and friends to join in an evening of social dancing led by Louis Mofsie, Hopi/Winnebago, the director of the Native group. Heyna Second Son Singers are the lead drum. The happening will run from 7-10 p.m. in the museum's Diker Pavillion. Click here for further details, and here for more on the Thunderbirds.