Here are the main takeaways from the announcement about the switch The Church of Jesus Christ of Latter-day Saints is making, starting in 2019, from three hours of Sunday services to two hours:
A 60-minute sacrament meeting each Sunday.
A 10-minute transition time.
A 50-minute class that will alternate each Sabbath between Sunday school on the first and third Sundays of the month and, on the second and fourth Sundays, male priesthood quorums, female Relief Society and Young Women meetings.
Meetings on any fifth Sunday will be under the direction of the congregation’s bishop.
Primary, for children, will be held each week during this same 50-minute period and will include singing time and classes.
In Relief Society/priesthood meetings, first Sunday council meetings will be discontinued as well as opening prayers and a hymn. These sessions will end with prayer.
Sunday school classes will not begin with a hymn or prayer but will end with prayer.
“Gospel Principles” classes, usually intended for new and potential converts, and all other supplemental classes will be discontinued.
Children, youths and adults will follow the same curriculum, “Come, Follow Me — For Individuals and Families,” to support gospel study at home
Source: The Church of Jesus Christ of Latter-day Saints news release