About T-Shirt Design
Some shirts are funny because they are super clever. This Is My St Patrick's Day Shirt is funny because it is simple and relatable. Anyone who is into everyday humor will probably understand the idea right away.
It makes sense for birthdays or holidays, especially if the person already likes this kind of humor. It has the relaxed feel people usually want from novelty shirts without getting too complicated.
It works well as a novelty t shirt because the joke is clear and the design has plenty of personality. The joke is quick, the message is clear, and that is really all it needs.