Janitor Joe happened in 1984.
Janitor Joe was created in 1984.
A possessive shows ownership. If a janitor has a house, we'd say it was the janitor's house. Just add an apostrophe + s to any regular singular noun, then add what that noun owns (or possesses) to get the possessive form. Here are a few examples: the janitor's bucket, the janitor's son, the janitor's uniform. Here are some others: The teacher's smile was sweet. I saw the robin's eggs in a nest. When the boy's shoelaces came loose, he tripped on Joe's bookbag. Look at the nouns that follow the possessive form. Ask yourself, "Who owns it?" The answer is~ the teacher, the robin, the boy, Joe. Or, for your question, the janitor. I just heard the janitor's keys in the hall. Who owns the keys? The janitor. The apostrophe is added AFTER the owner and is followed by an "s" for a singular, regular noun.
Joe Danger happened in 360.
Viewtiful Joe happened in 2003.
Pogo Joe happened in 1983.
Joe Blade happened in 1987.
janitor janitor janitor
The cast of Until You Came Along - 2006 includes: Joe Fleming as Janitor
Car Battler Joe happened in 2001.
Legend of Success Joe happened in 1991.
Joe Montana Football happened in 1991.
No, he was not a janitor.