Mr. Rewrite has the grill primed with propane and the fridge stuffed with hot dogs. He's ready to celebrate. U-S-A! U-S-A!!!
But don't expect Mr. Rewrite to celebrate the 4th of July. It isn't that he's unpatriotic. He just has a thing about proper nouns and following Associated Press style.
According to AP and the federal government, the holiday is officially the Fourth of July, July Fourth or Independence Day. If you want to be Mr. Rewrite's friend (and who wouldn't want to be?), you should eschew references to the 4th of July or July 4th.
Why go with the Fourth of July and July Fourth? Mr. Rewrite doesn't care. He pays AP $25 a year or thereabouts to make these decisions for him.
Since most of the major media are bound by AP style, there's no reason why Mr. Rewrite should find THOUSANDS of erroneous references on Google News to the 4th of July and July 4th. Yeesh.
If you are simply referring to the date, by the way, AP style calls for July 4. Per AP, never use ordinal numbers for dates.