Is the Day of Yahweh Initiated?

Zephaniah's portrait of the day of Yahweh as cataclysm, conquest, and sacrifice likely foreshadows Christ's tribulation unto triumph. The Baptizer anticipated that a fiery display of divine fury would distinguish the righteous from the wicked on Yahweh's day. I will argue in my next lecture that Pentecost initially fulfills the day of the Lord as renewal. And this suggests that Luke views the darkness associated with the cross-event as fulfilling the Old Testament's anticipations of cosmological disturbance at YahweH's day of wrath.