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Known as Día de la Revolución de Mayo, this holiday is always celebrated on May 25, regardless of the day of the week. Anniversary of the First Independent Government in Buenos Aires. On May 25 1810 a small revolution took place in Buenos Aires. This was the first step towards independence.See officeholidays for more details. Read more »

National Missing Children's Day is an annual observation in the United States designed to highlight the problem of child abduction. It falls on May 25 - on that date in 1979, six-year-old New Yorker Ethan Patz disappeared on his way to school. National Missing Children's Day was first observed in 1983. See timeanddate for more details. Read more »