Unlike the usual three weekday services, Yom Kippur has five prayer services.
The three regular weekday services are Shacharit in the morning, Mincha in the afternoon, and Maariv in the evening. Jewish festivals and Shabbat add Mussaf, the “additional” service, bringing the usual holiday total to four. Yom Kippur adds one more: Ne’ilah, the closing service, traditionally held near sunset.
Ne’ilah is distinctive because it is associated with the final moments of Yom Kippur and the closing of the day’s spiritual “gates.” Its Amidah includes repentance and confession, and the service commonly concludes with the Shema, declarations of God’s kingship, and a shofar blast marking the fast’s end.
The number five refers to distinct prayer services, not simply five prayers or five synagogue visits. Individual customs and liturgical details vary among Jewish communities, but the traditional Yom Kippur structure remains five services: Maariv, Shacharit, Mussaf, Mincha, and Ne’ilah.