Secular holiday : The world's most widely celebrated holiday, New Years was set on January 1 by Julius Caesar because that was the date the Roman consuls took over their duties. Paid holiday when falling on Saturday or Sunday

Secular holiday : as observed in Morocco

Secular holiday : according to the Polisario

Secular holiday : The idea of an international women's day was first put forward at the turn of the 20th century amid rapid world industrialization and economic expansion that led to protests over working conditions. Women from clothing and textile factories staged one such protest on 8 March 1857 in New York City. The garment workers were protesting what they saw as very poor working conditions and low wages. The protesters were attacked and dispersed by police. These women established their first labor union two years later. Wikipedia

Secular holiday : Chicago, Saturday May 1st, 1886: 350,000 workers go on strike to call for an 8-hour working day. Industries are paralyzed nationwide. On Monday, as demonstrations go on, the police open fire. On Tuesday, Chicago is again on strike. Following a bomb launched against them, the police shoot again. 12 dead, of which 7 policemen. 8 anarchists will be condemned and executed. In 1889, the Socialist International Movement met in Paris and declared this day international workers' day . The Soviets will follow suit, just as the Nazis. In France, under the Vichy regime (1940-1944), the celebration is renamed Labour Day .

Secular holiday : according to Polisario sources