Billy Sunday was a famous preacher who held large events around the United States in the late 1800s and early 1900s. These events, sometimes called "revivals," were large gatherings of people who wanted to hear Billy Sunday preach about Christianity. During his revivals, people would sing, pray, and listen to inspiring words from Sunday. Many people made changes in their life after hearing him preach and becoming inspired. Sunday was a popular preacher for over 40 years, and changed many people's lives.