Wormwood said:
If the Didache is a somewhat problematic work and its dating is anything but certain. Some claim it to be 1st century, but in my estimation more seem to view it as either early 2nd century or even later than that.
"Now, it is noteworthy that the very title of the Didache connects at least the first tract in one way or another with “the Twelve Apostles”, and it is not rash to conclude that it was their way of catechizing that found its way into the Didache. When this happened we do not know; but since the Didache offers a somewhat modified form of the Apostolic decree (see 6.2 and 3), some time must have elapsed between the year 50 and the date of composition. If we allow the space of a whole decade to have intervened between the two events, we reach the year 60, and it is impossible to disprove the statements of some scholars that the Didache was written, if not in whole, at least in part, between 60 and 70. others prefer the period between 70 and 80, whilst some others still cling to the following decade, 80-90." (
Ancient Christian Writings Volume Six, 1957 edition)