Happy Grundsaudaag! The ancient Germanic history of Groundhog Day

You say Groundhog Day, I say Grundsaudaag: how German and Swiss settlers in Pennsylvania created a new language – and a much-loved American holiday.

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Every 2 February since at least 1886, people have been gathering in the Pennsylvanian town of Punxsutawney to watch a groundhog – a furry rodent – crawl out of a hole after its winter sleep. If the day is sunny and the groundhog sees its own shadow, there will be six more weeks of cold weather, according to legend – but if it's a cloudy day, and there is no shadow, spring has arrived. Across the US, the quirky tradition is known as Groundhog Day. But among its original celebrants, it has a different name: Grundsaudaag.

https://www.bbc.com/future/article/20240131-how-the-pennsylvania-dutch-created-groundhog-day 

 The Germanic origins of Groundhog Day can be traced back to the ancient Christian tradition of Candlemas, which falls on February 2nd. German settlers in Pennsylvania expanded on this concept by selecting an animal, initially the hedgehog, as a means of predicting the weather. When they came to America, they switched from hedgehogs to groundhogs, which were more abundant in the region