About 1,600 people dressed as Rosie the Riveter attempted to break their own Guinness World Record during the 3rd annual Rosie Rally in Richmond , Calif., on Saturday, Aug. 12, 2017. Last year Richmond set the record with 2,229 people dressed as Rosie the Riveter since World War II. Richmond still holds the Guinness World Record and they plan on trying to break it next year.