sentences:  In 2017, the Casa Rosada of Argentina instituted, for one lunch of the day, meat-free Mondays, serving only vegan options to its approximately 500 employees, including Argentinian President Mauricio Macri.Meatless Mondays is related to efforts to add daily vegetarian and vegan school meals.An attempt by the Greens in Brighton, England, UK to initiate Meat-Free Mondays, thereby stopping the local council cafeteria selling any meat-based foods, was halted after opposition from council staff.