Engineer's Day in Brazil
Engineer's Day in Brazil is held on December 11. 11 December 1933 Day that the Law 23.659 regulated the Engineer, Architect and Surveyor professions. This event in the second decade of the month December is annual. 
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Engineers' Day is celebrated in various countries on different dates throughout the year. As of November 20, 2019, the World Federation of Engineering Organizations (WFEO) designated March 4 as 'World Engineering Day for a Sustainable World'.
Engineer's Day is celebrated annually on December 11 in Brazil. The date honors the professionals in Engineering, an exact field that covers several types, according to their specialties (civil engineering, agricultural engineering, computer engineering, electrical engineering, chemical engineering, just to name a few).
Engineer's Day originated from the Decree of Law No. 23,569, dated December 11, 1933, which regulates and makes official the professions of Engineer, Architect and Surveyor in Brazil.
In addition, the decree created the Confea/Crea system to supervise and guide the exercise of the profession under the Getúlio Vargas government. The Crea - Regional Council of Engineering and Agronomy operates in each state and at the national level is Confea - Federal Council of Engineering and Agronomy.
Therefore, December 11th is the Engineer's Day and Confea's anniversary. There is also the Engineering Day, which is celebrated on April 10th in Brazil.
Similar holidays and events, festivals and interesting facts
Argentina Social Worker Day on December 10 (Día del Trabajador Social);
Clown Day in Mexico on December 10
Clown Day in Brazil on December 10 (In Brazil, they call it dia Internacional do palhaço);
Physicist's Day in Mexico on December 10
Broadcaster's Day in Venezuela on December 11
Private Security Day in Chile on December 11 (since 2019);
Engineer Appraiser and Engineering Expert Day in Brazil on December 13
National Salesperson Day on December 13
Sailor's Day in Brazil on December 13