The event is celebrated in more than 400 places worldwide, with the largest ceremony taking place on the A&M campus at College Station. There, the program is set for 7 p.m. at Reed Arena.
Youngkin, 67, is principal for the Bryan law firm of Youngkin and Associates. He was recently inducted into A&M's Corps of Cadets Hall of Honor.
He received a Bachelor of Science degree in May 1969 from A&M, where he was head yell leader, a Ross Volunteer in the Corps of Cadets, a class officer, and recognized as a Distinguished Student.
He served in the U.S. Army from 1970-72 in the 18th Airborne Corps, and was stationed in Vietnam from 1971-72. He graduated from Baylor Law School in 1975, and served as President of the Brazos County Bar Assn. from 1985-86.