No, it's not.

A quick little quiz:

What's the correct spelling and punctuation of the federal holiday being celebrated tomorrow (the third Monday in February):
(a) Presidents' Day,
(b) President's Day, or
(c) Presidents Day?

Certainly, if you look in the ads in the paper today, you can find support for all options, sometimes with two or three of the variations being used in the same ad. And it makes a difference, as the first would seem to celebrate all presidents, regardless of how poor they might have been; the second would appear to celebrate a single, albeit anonymous, president; and the last looks like it honors the father-and-son pair of presidents whose last name is "Day."

So which of the possible answers is correct?

You guessed it, this is a trick question. The correct spelling and punctuation of the holiday is "Washington's Birthday".

If it makes you feel better - and I'm not sure it should - the schools systems in Westmoreland County, Virginia, and the City of Alexandria, Virginia (where George Washington was born and where Mount Vernon is located) both refer to the holiday as "Presidents' Day." And shame on them.