A day is coming, not too far away, that will be the ultimate Father's Day, the Day of the Father, when all the children of God will see, live with, and grow with our Father on earth. This glorious time, following Jesus Christ's millennial reign, marks the beginning of a new era as described in Revelation 21:1-5, where a new heaven and a new earth emerge, and the holy city, New Jerusalem, descends from heaven. A loud voice from heaven declares that the tabernacle of God is with men, and He will dwell with them, and they shall be His people, and God Himself will be with them and be their God. He will wipe away every tear, and there shall be no more death, sorrow, crying, or pain, for the former things have passed away. He who sits on the throne proclaims, "Behold, I make all things new," affirming the truth and faithfulness of these words. This ultimate Father's Day will be a time when the focus is on Him and what He has planned for His children. It is His day, His time, when He will enjoy His many billions of sons and daughters, all in His image and character, living obediently in His grace according to His Word. As a loving Father, He will think of bestowing blessings on us, far beyond what we can imagine, as stated in I Corinthians 2:9, where eye has not seen, nor ear heard, nor entered into the heart of man the things which God has prepared for those who love Him. In His presence, there is fullness of joy, and at His right hand are pleasures forevermore, as expressed in Psalm 16:11. God hasten this ultimate Father's Day, when our Father in heaven intimately reveals His plans, hopes, and dreams for His Family of beloved children.

The concept of the Day of God emerges directly from II Peter 3, where Peter, writing of the last days and the coming dissolution of the heavens and earth by fire, urges believers to be "looking for and hastening the coming of the day of God" (verse 12). Since the Lord and God are the same entity, this "day of God" is identified with the "day of the Lord." Peter had already established in verse 8 a crucial principle: "with the Lord one day is as a thousand years, and a thousand years as one day." This means the day of God should be understood as a thousand-year period rather than a literal twenty-four-hour day. This principle did not originate with Peter but was drawn from Psalm 90:4, written by Moses, which states, "For a thousand years in Your sight are like yesterday when it is past, and like a watch in the night." Notably, this psalm also deals with judgment and the shortness of human life, paralleling Peter's message about being prepared for coming judgment. Revelation 20:4 confirms this thousand-year framework explicitly, stating that the saints "lived and reigned with Christ for a thousand years," establishing conclusively that the day of God refers to the Millennium, the period of Christ's reign as King of kings. This timing principle connects to the creation account in Genesis 2:1-3, where God rested on the seventh day after six days of creating the heavens and the earth. If a day equals a thousand years to God, then the six days of creation prefigure six thousand years of human history under Satan's influence, while the seventh day represents God's thousand-year rest—the Day of God—when He becomes the dominant influence over humanity. This ties together several threads: the Day of the Lord, the Day of God, the rest of God, the thousand-year-as-a-day principle, and the Sabbath pattern established at creation. The Feast of Tabernacles, observed for seven days, pictures this future Day of God in miniature. Just as the Israelites dwelled in booths symbolizing an unsettled pilgrimage, and just as the feast includes harvest symbolism, the seven-day period represents a time of judgment and process—ultimately pointing to the Millennium as the fulfillment. The sequence of festival observance itself mirrors prophetic events: Trumpets pictures Christ's return, Atonement pictures Satan's binding, Tabernacles pictures Christ's thousand-year reign (the Day of God), and the Last Great Day pictures the Great White Throne Judgment. The deeper meaning of this coming Day of God is clarified through the Hebrew and Greek terminology for "rest." Rather than mere inactivity, God's rest—and by extension the Day of God—centers on the word sha'bat (to stop, cease, desist) rather than nuwach (to rest, repose). Paul's use of katapausis and the unique term sabbatismos in Hebrews 4 reinforces that this future Day of God involves ceasing from rebellious, self-directed works and beginning godly activity. Thus the Day of God, the thousand-year reign of Christ, is fundamentally the appointed period for the conversion of humanity, when people cease their own ways and enter into God's rest through active, righteous work under Christ's direction.