National No Patrick Day is a holiday in Bikini Bottom where all the Bikini Bottomites have a day without Patrick Star. This event happens right after the holiday National No SpongeBob Day in the final scene of the episode "Gone."
After Patrick explains to SpongeBob about what happened on National No SpongeBob Day, he himself immediately announces that it is National No Patrick Day. The Bikini Bottomites then go back into the bus, and SpongeBob pushes Patrick out, beginning the holiday. The latter immediately forgets what he just said and wonders where everybody went as the episode ends.