Last August, nearly 20,000 Latter-day Saint young single adults came together to sing, dance, play, pray, run and worship over three weekends. By all accounts, it was a smashing success.

They’re back again this weekend for a three-day festival to celebrate their membership in The Church of Jesus Christ of Latter-day Saints, to strengthen their faith, and to feel a sense of belonging.

And, they say, to try to break a mark recognized by the Guinness World Records for “the most contributions to a birthday card” — for President Russell M. Nelson, who turns 100 in September.

Earlier this month, the Utah-based faith raised the age limit for “young single adults” from 30 to 35, while the term “single adults” now describes unmarried members ages 36 and older.

Here to talk about the coming event and the changing demographics is Sara Sumsion, a young single adult who is working on a master’s degree in marriage and family therapy at Northwestern University, and Richard Ostler, who has served as a bishop over a YSA ward, or congregation.