Targum Jonathan on Leviticus
It is a Sabbath and time of leisure for you to humble your souls. And you shall begin to fast at the ninth day of the month at even time; from that evening, until the next evening, shall you fast your fast, and repose in your quietude, that you may employ the time of your festivals with joy.
Targum Jerusalem
From evening to evening you shall fast your fast, and repose in your quietude, that you may employ the time of your festivals with joy.