St. Urban's Day was primarily celebrated in Germany. It may or may not have been brought to the American colonies.
The holiday was a sort of tool of prognostication for vintners and masters of vineyards. On this day, the wine makers and/or vineyard growers would set up a table outside, and upon it they would place greens and flowers along with the image of St. Urban. Then they would wait and watch to see what type of weather the day would bring.
If the day turned out to be clear and fair, then it would be declared that the vineyards would be fruitful and that the vintners would create extraordinary wines that year.
If the day turned out to be stormy and rainy, then it would be declared that the vineyards' produce would be disappointing, and that the vintners would have a bad vintage.
In the event that the day turned out clear and fair, the image of St. Urban would be sprinkled with drops of wine; but if the day turned out foul and rainy, the image would be pelted with filth and puddle water.
