But without further ado, note Presidents Day above. Yes, that is the correct editorial style, with no apostrophe, commonly preferred by editorial style manuals. Or, as I put it in Garbl's Editorial Style Manual:
Presidents Day Not President's Day or Presidents' Day.Also, go ahead and take the quiz at the linked article. But more interesting is the website mentioned there, comparing the style manuals of Yahoo and the Associated Press. That website also mentions another comparison, of the AP Stylebook and the Chicago Manual of Style.
Washington's Birthday Capitalize birthday when naming the official U.S. holiday, called Presidents Day by some states and organizations to also honor President Lincoln and other presidents. Washington was born on Feb. 22, but the legal federal holiday is the third Monday in February.