Are you familiar with Gospel or Christian music?
I am. I enjoy both Gospel and Christian music. 
I do too.  Gospel music, to my surprise, can be traced to the early 17th century.
The early 17th century? I would have guessed even sooner than that. 
Yes, me too.  Actually the audience really increased in the 1920's due to the advent of radio. 
What about Christian music? Is there a date that is recorded for that becoming more popular?
Well, I read that following World War ll gospel music grew and concerts became quite elaborate.  But, contemporary Christian music became popular in the 1980's.
I am sure with all that transpired with the war, people were looking for new ways to both inspire faith, and music is always a good way to relate to people. 
That's so true. Christian music today really focuses on praise and worship styles similar to pop or rock music.