Update (2022); requested updated info on last festival and plans for 2022.
Latest: October 4-6, 2019; 17th annual 
Founded:
Venue: Madrid, Spain
Contact: cursosateneo1mayo@gmail.com
Another site
Another contact: ateneo1mayo.madrid@usmr.ccoo.es
Muestra de Cine y Trabajo (Labor Film Program)
30
Jan
THE LABOR FILM DATABASE 