When was the tradition of Groundhog Day established?
The tradition of Groundhog Day was established in 1800
What is the significance of the groundhog seeing its shadow?
The significance of the groundhog seeing its shadow is that it predicts six more weeks of winter.
What is the connection between the groundhog's behavior and the weather?
The connection between the groundhog's behavior and the weather is that the groundhog's behavior is said to predict the arrival of spring.