Daniel continued even to the first year of King Cyrus. Bible see other translations

“even to the first year of King Cyrus.” This verse is not saying that Daniel’s life and ministry stopped during Cyrus’ first year; that would contradict Daniel 10:1. It is saying that Daniel still continued up to that point, when the Babylonian Empire came to an end, which was an amazing feat in those days. Daniel was taken into captivity by the Babylonians when he was in his mid-teenage years, and yet was not only still alive, but was still performing his ministry when Cyrus the Great of Persia (c. 600-530 BC) began to reign over Babylon (the conquest was October, 539 BC). Daniel would have been around 80 years old when Cyrus conquered Babylon.

Commentary for: Daniel 1:21