This article is a response to a claim made by a Christian commenter on the “Quran and Bible Blog” regarding the approximate date when the Gospel of John, the fourth and last of the “canonical” gospels, was written. In short, the claim is that the gospel was written before 70 CE (i.e. before the temple was destroyed), and thus much closer to the time of Jesus (peace be upon him). This claim is not new, but it would seem strange to most students of New Testament history. In response to this claim, we will first provide the current scholarly views on the date the gospel was written. In the second part, we will analyze the claim that the gospel can be reliably dated to before 70 CE and show that the reality is quite different. Finally, after all is said and done, we will also briefly discuss the all-important issue of authorship.
https://quranandbibleblog.wordpress.com/2019/02/19/john-52-and-the-date-of-the-fourth-gospel-a-response-to-a-christian-apologist/