The Prophet Joel has been called “the prophet of Pentecost”, “the prophet of hopefulness” and the “the prophet of the Spirit”, yet in spite of these nicknames, little is actually known about him as a man. In fact, there is a very great disagreement among scholars as to when his ministry took place, with estimates that range from around 900 BC to as late as 350 BC… and just about everywhere in between. I can only say that I think he belongs somewhere around 835 BC, and leave you to make your own call.
The Life Project. 2016. A Brief Introduction to Joel | The Life Project. [ONLINE] Available at: https://lifereference.wordpress.com/2016/11/28/a-brief-introduction-to-joel/. [Accessed 29 November 2016]