When were the beatitudes written?

Most New Testament scholars believe that Matthew's Gospel, which contains the eight beatitudes, was written in the 80s of the first century. They believe that Luke's Gospel, which contains four of the beatitudes in a slightly different form, was written around the turn of the century.

The four beatitudes more or less common to both Matthewand Luke are understood to have been copied from the hypothetical 'Q' document, which was written around the middle of the first century.