Google felt the need to put it on my calendar.
Only way to be rid of it is to turn off all holidays
Yet another reason to be glad I'm out of the US:
BTW, if you add "Christian Religious Holidays" and change the settings for your national holidays to simply "public holidays" (and not "public and other holidays" you can rid of the extraneous BS like "gay pride month", "national mayonnaise day", and the like)