International Workers' Day (also known as "May Day") is a celebration of the international labour movement. May 1 is a national holiday in more than 80 countries and celebrated unofficially in many other countries.
Libya 1969 stamps issue "50th Anniversary of the International Labour Organization I.L.O.". More information in: www.ilo.org
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Libya 1969 stamps issue "50th Anniversary of the International Labour Organization I.L.O.". More information in: www.ilo.org