GOD'S WORD® Translation
The sun will become dark, and the moon will become as red as blood before the terrifying day of the LORD comes."

American Standard Version
The sun shall be turned into darkness, and the moon into blood, before the great and terrible day of Jehovah cometh.

Berean Study Bible
The sun will be turned to darkness and the moon to blood before the coming of the great and awesome Day of the LORD.

Douay-Rheims Bible
The sun shall be turned into darkness, and the moon into blood: before the great and dreadful day of the Lord doth come.

English Revised Version
The sun shall be turned into darkness, and the moon into blood, before the great and terrible day of the LORD come.

King James Bible
The sun shall be turned into darkness, and the moon into blood, before the great and the terrible day of the LORD come.

World English Bible
The sun will be turned into darkness, and the moon into blood, before the great and terrible day of Yahweh comes.

Young's Literal Translation
The sun is turned to darkness, and the moon to blood, Before the coming of the day of Jehovah, The great and the fearful.

Joel 2:31 Additional Translations ...