A few scholars believe John could have written this book as early as 45 A.D., the date when Saul of Tarsus' persecutions drove many Christians out of Jerusalem (cf. Acts 8:1-4).9There are two main problems with such an early date. First, John seems to have assumed that the Synoptic Gospels were available to the Christian public. There is some doubt about this since it assumes an assumption, but most scholars believe, on the basis of content, that John selected his material to supplement material in the Synoptics. This would put the fourth Gospel later than the Synoptics. Second, according to early church tradition the Apostle John lived long into the first century. This would make a later date possible even though it does not prove a later date. Some students of the book believe that John 21:18-22 implies that Peter would die before John did, and Peter died about 67 A.D. In general, most authorities reject a date this early for these and other reasons.
Some conservatives date the Gospel slightly before 70 A.D. because John described Palestine and Jerusalem as they were before the Roman destruction (cf. 5:2).10This may be a weak argument since John frequently used the Greek present tense to describe things in the past.11Some who hold this date note the absence of any reference to Jerusalem's destruction in John. However there could have been many reasons John chose not to mention the destruction of Jerusalem if he wrote after that event. A date of writing before the destruction of Jerusalem is also a minority opinion among scholars.
Many conservative scholars believe that John wrote his Gospel between 85 and 95 A.D.12Early church tradition was that John wrote it when he was an older man. Moreover even the early Christians regarded this as the fourth Gospel and believed that John wrote it after the Synoptics. It is not clear if John had access to the Synoptic Gospels. He did not quote from any of them. However, his choice of material for his own Gospel suggests that he probably read them and chose to include other material from Jesus' ministry in his account to supplement them.13
The latest possible date would be about 100 A.D. Some liberal scholars date this Gospel in the second century. The Egerton papyrus that dates from early in the second century contains unmistakable allusions to John's Gospel.14This seems to rule out a second century date.
It seems impossible to identify the date of writing very exactly, as evidenced by the difference of opinion that exists between excellent conservative scholars. A date sometime between 65 and 95 A.D. is probable.
