The prophecy of Zephaniah is a compendium of prophetic thoughts on the nature of YHWH’s relationship with His people. This research critically builds on past scholarships and exegetically demonstrates the thematic, literary and theological relationships of Zeph 1:14-18 and 3:14-20 with the rest of the Twelve Minor Prophets, Deuteronomistic History and with Psalm 126 and insists on Zephaniah’s creative and unique understanding of God, His judgment and saving roles. Taking the judgment and wrath narrative in Zeph 1:14-18 as its pericope of exegetical departure, the author diachronically and synchronically studies in detail the contents, meaning, relevance and the theological values of Zephaniah’s Day of YHWH to all cultures and religious communities. In particular, he emphasizes the fuller and salvific notion of a God who not only judges, intervenes in human history, punishes sinners, but loves, shows mercy, rewards, saves, inspires hope and restores the fortunes of the remnant who repents (Zeph 3:14-20).