Zephaniah is speaking of what I believe, we call the Great Tribulation that John also wrote of in Revelation. We have been leading up this time of God’s wrath for a long time.
The time is drawing down. The start of the coming 7 years of Tribulation of Daniel’s 70th week could be in the imminent future.
This generation is full of scoffers, mocking the prophesied return of Jesus Christ to Planet Earth.