The last king of the kingdom of Israel, Hosea ben Elah, wished to heal the breach, and removed all the guards from the roads leading to Jerusalem, thus allowing his people to make the pilgrimage again. Event #5 - At the beginning of the Second Temple period, the Land of Israel lay almost totally waste, and the wood needed to burn the sacrifices and for the eternal flame that had to burn on the altar was almost impossible to obtain. And dampness and cold are ideal conditions for the breeding of worms in wood.Each year a number of brave people volunteered to bring the wood needed from afar – a trip which was dangerous in the extreme. As a result, all the wood that would be needed until the following summer had to be collected before the cold set in.This posed a threat of annihilation to the tribe of Benjamin. The people realized that if they kept to their prohibition, one of the 12 tribes might totally disappear.
In addition to this noteworthy event, five other events occurred on Tu B'Av: Events #2 and 3 - Following the case of the daughters of Zelophehad (see Numbers, chapter 36), daughters who inherited from their father when there were no sons were forbidden to marry someone from a different tribe, so that land would not pass from one tribe to another.
Generations later, after the story of the "Concubine of Giv'ah" (see Judges, chapters 19-21), the Children of Israel swore not to allow their daughters to marry anyone from the tribe of Benjamin.
This is what was meant by our Sages when they said: "No days were as festive for Israel as the 15th of Av and Yom Kippur," for there is no greater joy than having one's sins forgiven – on Yom Kippur for the sin of the Golden Calf and on Tu B'Av for the sin of the spies.
In the Book of Judges, Tu B'Av is referred to as a holiday (Judges ).
Finally on the 15th of Av, when the full moon appeared, they realized definitely that the ninth of Av had come and gone, and that they were still alive.
Then it was clear to them that God's decree was over, and that He had finally forgiven the people for the sin of the Spies.His father, Rabbi Moshe Chaim Lau, was the last Chief Rabbi of the Polish town of Piotrkow.At age 9, Rabbi Lau was the youngest person liberated from the Buchenwald concentration camp, and he came on the first boatload of Holocaust survivors to Israel.We do not say Tahanun on that day, nor are eulogies rendered.By the same token, if a couple are getting married on that day (and, as we will see below, it is the custom for the bride and groom to fast on their wedding day), neither fasts.The last day that wood was brought in for storage over the winter months was Tu B'Av, and it was a festive occasion each year when the quota needed was filled by that day.