when was the book of enoch written

The Book of Enoch, particularly the earliest parts known as 1 Enoch, was written during a period spanning from approximately the 300s BCE to around 100 BCE. Most scholars agree that the earliest sections were composed in the pre- Maccabaean period, which is before 164 BCE. The overall composition likely took place over a long period, possibly from the third century BCE until the first century BCE, with some parts potentially written even later into the first and second centuries BCE. The book is a composite work with multiple authors and layers, originally written in Aramaic and Hebrew, but the full text survives primarily in an Ethiopic translation derived from Greek versions.