The sun will be turned to darkness and the moon to blood before the coming of the great and glorious day of the Lord. (NIV)
The sun shall be turned into darkness and the moon into blood before the obvious day of the Lord comes--that great and notable and conspicuous and renowned [day]. (AMP)
The sun shall be turned into darkness, and the moon into blood, before the great and notable day of the Lord come: (KJV)