That Unique Day

 Zechariah 14:5b Then the Lord my God will come, and all the holy ones with him.
6 On that day there shall be no light, cold, or frost. 7 And there shall be a unique day, which is known to the Lord, neither day nor night, but at evening time there shall be light.
8 On that day living waters shall flow out from Jerusalem, half of them to the eastern sea and half of them to the western sea. It shall continue in summer as in winter.
9 And the Lord will be king over all the earth. On that day the Lord will be one and his name one.

Numerous prophets give reference to "The Day of the Lord", which refers to a time of God's judgment and making all things right.  The chapter begins with all nations turning on Jerusalem and coming up against her, but then the Lord comes to her rescue and establishes His kingdom.  When the lights go out in the world, His light shines forth. When the earth splits apart, He provides water for the world.  The religions of the world will all give way to worship of the true Lord.  This will be that unique Day of the Lord.