Ключевые слова: 1, 01, 1st, america, american, calendar, celebrate, celebration, countries, date, day, demonstration, employment, event, first, freedom, greeting, happy, holiday, international, labor, laborer, labour, latin, march, may, military, monday, movement, national, north, occupation, public, revolution, september, sign, south, st, states, street, symbol, traditional, united, us, usa, work, worker, workforce,