Do all 50 states celebrate Memorial Day?

Answer 1

Before World War I Memorial Day was officially called Decoration Day. This day was to honor all military personnel who had died during the US Civil War, both Union and Confederate. It was first observed on May 30, 1868 at Arlington National Cemetery, three years after the Civil War ended. By 1890 all of the northern states recognized the holiday. But the southern states did not! Each southern state had their own "Memorial Day"-like holiday and they were on different days of the year.

It was not until after World War I that Decoration Day included honoring US Military personnel who had died in all wars in which the United States was involved. After this change the southern states began to honor the May 30th date. However they still to this day also commemorate the individual days they first used.

So the actual answer to the question is that, yes, all 50 states do celebrate Memorial Day as it is a national holiday. Decoration Day was officially renamed to Memorial Day in 1967 and in 1971 the holiday was moved from May 30th to the last Monday in May.