
1) Christian mission
Found on
https://www.crosswordclues.com/clue/youthquake

YouthQuake is an annual conference that is the primary youth event of ACTS 29 Ministries, a Christian ministry based in Atlanta, Georgia. The event was started in the early 1990s by Episcopal Renewal Ministries and its then-president, the Rev. Charles Fulton. In 1993, the location was changed to Ridgecrest Conference Center in Ridgecrest, North Ca...
Found on
http://en.wikipedia.org/wiki/YouthQuake
[movement] Youthquake was a 1960s fashion, musical and cultural movement. The term was coined by Vogue`s editor-in-chief Diana Vreeland in 1965. London was the centre of the movement. Teenagers dominated the fashion and music scene. The fashion of youthquake was fun, spirited and youthful – miniskirts and jumpsuits. Poster girls of the yo...
Found on
http://en.wikipedia.org/wiki/Youthquake_(movement)

the series of cultural upheavals of the 1960s
Found on
http://phrontistery.info/y.html
No exact match found.