jan 1, 400 BC - Old Testament translated into Aramaic
In 400B.C. the Old Testament began to be translated into Aramaic. This helped the Jewish people, who began to speak Aramaic from the time of their captivity in Babylon, to understand the Old Testament in the language that they commonly spoke. In the first century Palestine of Jesus' day, Aramaic was still the commonly spoken language.
Added to timeline:
The History of the Bible