xkcd #3202: Groundhog Day Meaning
Title text:
Originally, the ceremony used a variety of rodents and mustelids, but over time most people agreed it made sense to standardize on a specific individual ground squirrel in Pennsylvania.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3202/
Americans will use any unit besides the metric system /s
Groundhog (Gr), a unit of uncertainty in weather predictions. The value of 1 Gr means the prediction is as good as pulling it out of a hat.