Yesterday was 9 Tammuz. In 587 BC, the walls of Jerusalem were breached (this was a Shemitah year and two Shemitah cycles after Lehi was told to exit Jerusalem--his exit was also in a Shemitah year). The Biblical king of Judah, Zedekiah, who "did evil in the sight of the Lord," was captured and taken to Babylon. Eight days later, on 17 Tammuz (commemorated with a Jewish fast day on July 5 this year), daily temple worship and sacrifice (Korban Tamid) was discontinued. Three weeks later, on 9 Av or Tisha B'Av (oddly, the day we did my brother's temple work), Babylon had completed the takeover of Jerusalem, destroyed the temple, and exiled the Jews to Babylon.
I testify that the Lord still honors the Biblical calendars He designed--though sometimes in unexpected ways. We have seen how the last two Biblical Shemitah cycles have ended--the stock market crash of 9/17/01 immediately following 9/11 and the stock market crash of 9/28/08--both 29 Elul for those Biblical years/Shemitah cycles. Our next 29 Elul is coming up this September, leading into the 120th Jubilee since Creation, according to the Biblical calendar. Hebrew tradition is that there will only be 120 Jubilees total. It will be 70 Jubilees since the Exodus and 40 Jubilees since the birth of Christ. Although the Shemitah year ends on 29 Elul, the Jubilee doesn't officially begin until the Day of Atonement, or Yom Kippur.
This year's Yom Kippur, in addition to beginning what is supposed to be the final Jubilee of Creation, is the 20-year anniversary of the warning that "the disintegration of the family will bring upon individuals, communities, and nations the calamities foretold by ancient and modern prophets."
D&C 136:35 comes to mind. The time is now to repent.
UPDATE: I just wanted to put this somewhere, but 1819 AD also began a Jubilee year--which means that the First Vision took place during a Jubilee. This year will be 4 Jubilees since then.