A new happiness report finds sharp declines in well-being among adolescents and young adults in the U.S. But the picture is better for people aged 60 and older, marking a striking generational divide.

Finland has held the title of world's happiest country for six years running. It wants to teach people how to unlock their "inner Finn" during a four-day masterclass at a lakeside resort in June.

A nationwide report measuring child wellness has ranked Georgia near the bottom. According to the Annie E. Casey Foundation's Kids Count report, Georgia...