The Ground hog day wasn't always looked as a silly tradition, infact it goes back thousands of years ago and in where it's rooted as movements of the sun.
Most civilization's relied on the sun and stars for when the time to began harvest for crops or preparing for the cold winter months to come, that has endured this celestial cues that have evolved into traditions that have been seen in holidays that have survived to this day.
Many cultures relied on calendar months that where slip up into qaurters to split up the two equinoxes into two sections where the day's and nights where equal and where the longest and shortest days that's fall's in the middle of the season.
While many people and traditions Followed this holiday like the druids, vikings and ancient germanic cultures, one noticeable culture that followed this was the Celts which cultures still echos in modern day calendars.
In modern day Celts are referred to Ireland, britian, Europe and france and including the Celts team and are not typically referred to ancient irony Celtic days as in ancient days, at one point majority of Celtics was known to be in Europe, the culture left an impact on calendar months and many traditions have survived into modern day including one which is know as Ground hog day.
The Celts also created the cross qaurter days that are symbolic to each equinox, that includes,
Beltane: which is celebrated to the start of summer months
Lughnasda: which is celebrated as the start of autumn
Samhain: Which is celebrated to mark the start of winter
Imbolic: which is celebrated to the beginning of Spring.