♻️ @workingclasshistory #OtD 4 May 1919 50,000 factory workers in Rio de Janeiro walked out for a maximum 8-hour working day and a 20% pay increase. In June workers in São Paulo joined them, and by the following month they won https://stories.workingclasshistory.com/article/10459/rio-de-janeiro-8-hour-day-strike