May Day was first ____ on May 1, 1890, after it was ____ by the first International Congress of Socialist Parties in Europe on July 14, 1889. It was declared for the workers in Paris to ____ every year on May 1 as the 'Workers Day of International Unity and Solidarity'. May 1 in Europe has historically been ____ with rural traditional farmers' festivals but later May Day became ____ with the modern labour movement.

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