Guy: "Can I tell you a joke?"
Spiderman: "Yes."
Guy: "You only have 11 months on your calendar."
Spiderman: "Why?"
Guy: *holds up knife* "Because I murdered May."
Listen here, dummy. You probably have to Google stuff all the time. The joke is that the dude killed "May" which is both a month and a name. So, if you take May off the calendar, you only have 11 months left. Get it now?