Dayley is married to Diane Wilcox and they are the parents of eight children.
Dayley received his bachelors degree from BYU in 1964. He received his MM degree from the University of Souther California in 1966 and a DA from the University of Northern Colorado in 1986.
Dayley joined the BYU faculty in 1967. Dayley was the first director of the BYU jazz ensemble, Synthesis. He also directed the brass ensemble and other organizations as well as many musical theatre productions. He has taught classes from trumpet to music theory and from film scoring to music business.
On the trumpet Dayley has performed with the Utah Symphony and many professional ensembles. He also has performed as a soloist with the Mormon Tabernacle Choir.
Prior to his appointment as assistant academic vice president, Dayley served as Dean of the College of Fine Arts and Communications at BYU as well as Chair of the Music Department and Associate Dean of General Education and Honors. Amongst his works are "Bring Forth My Zion", "First You Have A Dream", the music to LDS hymn # 220 "Lord, I Would Follow Thee", words and music to "Faith in Every Footstep", and the music to "I Feel My Savior's Love", "Every Star is Different", "Hum Your Favorite Hymn", "Home" and "The World Is So Big" in the LDS Church Primary's Children's Songbook. Dayley has also written musical sections for passages in the Book of Mormon.
In 2002 Dayley became president of the Church's BYU 2nd stake, succeeding fellow BYU professor Byron R. Merrill in this position.
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