Groundhog Day as we know it in the U.S. started in the late 19th century, with the first official celebration held on February 2, 1887, in Punxsutawney, Pennsylvania. Its deeper roots, however, go back centuries to European—especially German—weather lore tied to Candlemas and older pagan midwinter festivals.

Quick Scoop: When did Groundhog Day start?

  • The first “official” Groundhog Day event took place in Punxsutawney in 1887, organized by a local group that became known as the Punxsutawney Groundhog Club.
  • This modern version centers on a groundhog (Punxsutawney Phil) emerging on February 2 to “predict” either six more weeks of winter (if he sees his shadow) or an early spring (if he doesn’t).
  • The tradition itself is older than 1887: it developed from Pennsylvania German customs that arrived in the 18th–19th centuries, where settlers adapted European animal-weather lore (often involving badgers or hedgehogs) to the local groundhog.
  • Those European customs were connected to Candlemas (a Christian feast on February 2) and even earlier Celtic and Germanic festivals around the halfway point between winter solstice and spring equinox.

Simple timeline

  1. Ancient Europe: Pre‑Christian and later Christian midwinter observances use animal behavior and weather on early February days to predict the rest of winter.
  1. 18th–19th centuries: German-speaking (Pennsylvania Dutch) immigrants bring this weather lore to Pennsylvania and apply it to groundhogs.
  1. 1887: First formal Groundhog Day celebration in Punxsutawney, marking the start of the modern holiday Americans recognize today.

In short: the idea behind Groundhog Day is centuries old, but the named holiday “Groundhog Day” started as a public event in Punxsutawney in 1887.

TL;DR: Groundhog Day’s folklore roots are ancient, but the U.S. holiday officially began on February 2, 1887, in Punxsutawney, Pennsylvania. Information gathered from public forums or data available on the internet and portrayed here.