The day after Whitsunday (Pentecost) is known as Whit Monday. The week that includes these two holidays, beginning on Whitsunday and ending the following Saturday, is called Whitsuntide. In the period from 1835 to just after the Civil War, Whit Monday was referred to as the “Dutch Fourth of July” in Lancaster, Pennsylvania, where rural people came to eat, drink, and be entertained. In Lenhartsville, another Pennsylvania Dutch town, Whit Monday was known as Battalion Day, and it was characterized by music, dancing, and military musters. Discuss
Source: The Free Dictionary