God created the heavens and the earth in six days, and on the seventh day He rested. Each Sabbath may be likened unto a down payment on the Messianic Era. We rest on Shabbat to symbolize the peace that we will have in the days of the Messiah.
In the Talmud, some of the sages viewed the seven days of creation as a broad outline for human history, as the Scripture says, “For a thousand years in Your sight are like yesterday when it passes by” (Psalm 90:4). Accordingly, they compared each of the six days to a millennia of history. Different rabbis offered differing opinions, but they generally agreed that the seventh day, the day of the Sabbath, corresponds to the seventh millennium—the thousand-year Messianic Era. In the poetic words of the sages, the Messianic Era will be a “day that is altogether Sabbath.”
Tz’enah Ur’enah says, “Man was created on the sixth day, for within six thousand years the Messiah will come.” The apostolic community held a similar view of redemptive history. The book of Hebrews compares the age to come to the Sabbath and speaks of the Sabbath as a foretaste of final salvation and the Messianic Era. The book of Revelation speaks of a coming millennium of peace—a thousand-year reign of Messiah during which the adversary is bound in chains. The Apostle Peter reminds us that “with the Lord one day is like a thousand years, and a thousand years like one day” (2 Peter 3:8).
Why doesn’t it say in regard to the Sabbath “and there was evening and there was morning” like it does for the other days? Because the Sabbath alludes to the world to come, and it is called the day that is completely Shabbat, and there is no night. (MinchahBelulah)
Though the Messiah may tarry, we eagerly await the coming return of Messiah, who will initiate that seventh millennium, a thousand-year era “that is altogether Sabbath.” May He come speedily, soon, and in our lifetimes.
(taken from FFOZ weekly Edrash)