Depending upon who you ask and where you ask them, May Day can have a few different meanings. As a one-word phrase, it's the notorious code for help. As a two-word proper noun, it can refer to the first day of summer in several European cultures whose origins date back to Pre-Christian times. But it's the other meaning as a two-word proper noun--that of a labor holiday--that is the subject of this week's episode. As today is May Day proper, tune in to learn all about the history of this intriguing holiday!