The history of Jesus began before history even began. The Bible is clear that Jesus is the Word of God and through Him all things were made. (John 1: 1-3) If Jesus is not God he could not be involved in the creation. Even the angels were not creators because they are also creatures.
The prophet Isaiah wrote concerning Jesus that he will be called, among other titles, Mighty God and Everlasting Father. (Isaiah 9:6)
The Jews wanted to stone him for calling himself "I Am".(John 8:58-59) The name God called himself when He sent Moses to free the Israelites from Egypt. (Exodus 3:14)
His apostle Thomas called him "My Lord and my God". (John 20:28) Take note that Jesus did not rebuke or correct Thomas because there was nothing to correct.
God calling the Son as God (Psalm 45:6-7) and Saint Paul reiterated this in Hebrews 1:8-9.
And lastly, Jesus called himself "The Alpha and the Omega". (Revelation 22:13)
Jesus is God and therefore He is timeless and everlasting.