What is your date for the authorship of Matthew? I read mine from the front matter of the "New American Bible" the one with the Catholic imprimature.
Since Matthew never makes mention of the destruction of Jerusalem in AD 70, although he gives the prediction of Jesus that it will be destroyed, that pretty much narrows it in before 70 AD. Most scholars put it between 55 and 70 AD. No serious scholars I have ever heard of put it after 100 AD.