<Tr> <Th> 2019 date </Th> <Td> May 27 (2019 - 05 - 27) </Td> </Tr> <Tr> <Th> Frequency </Th> <Td> Annual </Td> </Tr> <P> Memorial Day or Decoration Day is a federal holiday in the United States for remembering the people who died while serving in the country's armed forces . The holiday, which is currently observed every year on the last Monday of May, was held on May 29, 2017 . The holiday was held on May 30 from 1868 to 1970 . It marks the start of the unofficial summer vacation season, while Labor Day marks its end . The holiday, from latest to earliest, is slightly more likely to fall on May 30, May 28 or May 25 (58 in 400 years each) than on May 27 or May 26 (57), and slightly less likely to occur on May 31 or May 29 (56). </P> <P> Many people visit cemeteries and memorials, particularly to honor those who have died in military service . Many volunteers place an American flag on each grave in national cemeteries . </P>

How many memorial days are in a year
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