The first of may or international worker's day is usually celebrated on the first of may.Beginning in the late 19th century, as the trade union and labour movements grew, a variety of days were chosen by trade unionists as a day to celebrate labour.1 May was chosen to be International Workers' Day to commemorate the 1886 Haymarket affair in Chicago, when there was a general strike for the 8 hour workday. During the soviet union 1st of may has become an important holiday in russia. We usually celebrate it by doing peacefull demonstrations.