FYI, President's Day is "officially" a celebration of George Washington's birthday. Washington was born on February 22 (or, possibly, February 11) and his birthday has been celebrated annually since 1796 and eventually became a national holiday. Following the assassination of Abraham Lincoln, some states made
his birthday, February 12, a holiday as well.
In 1968, legislation was passed which rationalized a number of federal holidays (shifting a lot of them to Mondays to effect long week-ends rather than interrupting weeks). It was decided to celebrate Washington's birthday on the third Monday of every February. As Lincoln was not similarly honored, the day popularly became known as President's Day, honoring whichever presidents happen to take anyone's fancy. I'm probably one of the few here who remembers getting
two presidential days off school in February (in some states) rather than one.
But, yes, our countries
are very different,
Julian - the Queen of England gets two birthdays every year, whereas all US presidents share only one.

Oh - and we don't have a holiday to simulatneously commemorate our most notorious traitor
and the sublimation of religious minorities.