Has the Day of Yahweh come yet?

some quotes by OPR on this question:

By this (Matthew 13) apparent allusion to Zephaniah , Jesus transfers the coming cosmic judgment described by the prophet from the devastation associated with judgment on old covenant Israel to the devastations associated with his final return . Jesus thereby indicates that the ultimate application of the prophetic threat of Zephaniah still is outstanding . The cosmic judgment that will reverse the creation is yet to come .

The finality of cosmic overthrow associated with the coming of Yahweh ' s Day in the fullest sense never came in the context of events as- sociated with the old covenant . It is not surprising , therefore , to find in the NT both passages which suggest an arrival of the Day of Yahweh in events current in NT times as well as passages looking to a future arrival of the great Day . Both of these perspectives must be kept in mind for a proper understanding of the contemporary significance of the coming of the Day . (already & not yet)

In a certain sense , the Day of Yahweh has come . But distinctive to the Day is the characteristic of finality . In a sense the Day came in association with certain events surrounding the advent of Jesus Christ . But in another sense the Day is yet to come . And as Zephaniah prophesied , it is near.
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Suffice it to say that the cosmic judgment associated with a dramatic theophany now may be understood in terms of the glorious return of Jesus Christ . On the day appointed he shall consummate all things .

COPYRIGHTED MATERIAL
O. Palmer Robertson. The Books of Nahum, Habakkuk, and Zephaniah (New International Commentary on the Old Testament). (Wm. B. Eerdmans Publishing Company, 1990).