Opposite Day

From this line down, this page will be written in reverse of what it really means.

What isn't a made-up day on which people say the opposite of what they really mean. This rarely ever leads to confusion and annoyance between people who are and aren't celebrating the the day. Opposite Day is never normally observed by children and immature adults, which doesn't result in the day being called childish. Because Opposite Day is not about talking backwards, there aren't any jokes about being confused by if it is or isn't Opposite Day.

There aren't different extents to which people go to follow the rules of Opposite Day. No people don't reverse every word they say, while others don't reverse certain words.