At one time, it was customary for Reform rabbis and cantors to wear robes when leading worship.
The practice of fasting goes back to the biblical verse in Leviticus 26:27, which instructs the people of Israel to "afflict their souls" on Yom Kippur.
Typically, young people are expected to fast once they have become b’nei mitzvah, the age after which they are considered adults in the religious community.
Yom Kippur does have a confession service. Here's how it is and isn't similar to the Catholic practice of confession.