How neat that the Huffington Post shared this little summary of Pioneer Day and a snippet from Mormon history!
Pioneer Day is one of the most important dates on the calendar for members of The Church of Jesus Christ of Latter-day Saints, also known as Mormons. It is an official state holiday in Utah, where the church is based, although it is often marked by Mormon communities outside of the state. Pioneer Day is celebrated yearly on July 24.
In February 1846, members of the budding LDS movement fled from their homes in Nauvoo, Illinois as a result of religious persecution and harassment.