May Day is also International Workers' Day, commemorating the labor movement's fight for fair working conditions.
1886
Haymarket Affair
Chicago workers strike for eight-hour day; explosion at Haymarket Square leads to martyrs' executions
1889
Second International
Socialist congress in Paris declares May 1st International Workers' Day to honor Haymarket martyrs
1890
First May Day
Workers across Europe and America demonstrate for labor rights on the inaugural International Workers' Day
1894
US Labor Day
Grover Cleveland, avoiding May Day's radical associations, makes September's Labor Day a federal holiday
1904
Amsterdam
International Socialist Congress calls for May Day demonstrations against war
1919
Eight-Hour Day
After decades of struggle, the eight-hour workday becomes standard in much of the industrialized world
1947
Loyalty Day
US attempts to rebrand May Day to counter socialist associations during the Cold War
2000s
Global Actions
May Day sees worldwide protests for immigrant rights, workers' protections, and economic justice