Janitor Joe was created in 1984.
Janitor Joe happened in 1984.
The Janitor's Boy was created in 2000.
George the Janitor was created in 1974.
The New Janitor was created on 1914-09-14.
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.
Eskimo Joe's was created in 1975.
janitor janitor janitor
Flow Joe was created in 1992.
Joe Musashi was created in 1987.
Joe Locke was created in 2009.
Joe Sugden was created in 1972.
Glass Joe was created in 1984.