what does the bible say?
The Bible doesn’t explicitly deal with the possibility of human time travel. However, it does express that God exists outside of time. He was “before” time, will be “after” time, and is not bound by its limitations. He created time it as a boundary for human life.
In our western context, we tend to view time as linear. We start at Point A and end up at point B. However, the middle-Eastern Hebrew mindset saw time as a cyclical series of patterns. They started at Point A, circled around to Point B, then came around again to Point A, establishing a pattern along the way as the cycle continued.
This is the contextual framework of Scripture. Some things—but not all—were created as cycles. God set evening and morning in motion, created spring to blend into summer, autumn, winter and back to spring. Man wasn’t meant to see time as something to control or manipulate but rather as a means to experience the patterns and character of God Himself.