This is the first episode of The Human’s Calendar podcast. Enclosed below are the sources of the information provided in the episode. If you have any feedback, email [email protected] https://www.history.com/this-day-in-history/the-st-valentines-day-massacre https://en.wikipedia.org/wiki/Saint_Valentine%27s_Day_Massacre https://www.history.com/topics/crime/saint-valentines-day-massacre