Cuban Builder Day
Cuban Builder Day is held on December 5. Día del Constructor. This event in the first decade of the month December is annual. 
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Cuban Builder's Day is celebrated every December 5 as proposed by Commander in Chief Fidel Castro Ruz.
This day was proposed by Fidel in 1972 on the occasion of the III Congress of Builders and in homage to comrade Armando Mestre Martínez. Moncada assailant and Granma expeditionary and martyr of the sector.
Although it was known later that Mestre did not fall precisely on the 5th in "Alegría de Pío" but was assassinated on the 6th, the tribute to the builders continued to be celebrated that day.
Similar holidays and events, festivals and interesting facts
Doctors' Day in Cuba on December 3
International Medical Day on December 3
Latin American Day for the Fight Against Oral Cancer on December 5
CARICOM–Cuba Day on December 8 (Caribbean Community);
International Radio and Television Day for Children on December 8
World Computing Day on December 9
Ophthalmologist Day in Argentina and Cuba on December 13