What does the Bible say about the specific day of Christ's coming?

In the book of Isaiah, the phrase 'in that day' signifies a crucial moment in God’s redemptive plan, pointing directly to the coming of Jesus Christ. This specific day is not merely a calendar date but represents God's appointed time for salvation through His Son. Isaiah emphasizes that the entire scripture focuses on this day when Christ would fulfill all types and prophecies, underscoring its significance in the eyes of God for the salvation of His people. This day was predetermined, demonstrating God's unwavering purpose in bringing His Son to save His chosen ones.