Yes, I forgot the 'extra mourning' which we observe during these nine days:
http://www.chabad.org/library/article_cdo/aid/144574/jewish/The-Nine-Days.htmThe first nine days of the month of Av, and also the morning of the tenth,1 are days of acute mourning for the destruction of the first and second Holy Temples.
During this time, we don’t:
* Eat meat or drink wine, for during this period the sacrifices and wine libations in the Holy Temple ceased.2 The exceptions to this rule are meat and wine consumed on Shabbat or as part of a meal that celebrates a mitzvah, such as a circumcision, bar mitzvah, or the completion of a tractate of the Talmud.
* Launder clothing (except for a baby’s)—even if they will not be worn during the Nine Days—or wear freshly laundered outer clothing.3 Those who wish to change their clothing daily should prepare a number of garments and briefly don each of them before the onset of the Nine Days. Then it is permitted to wear these “non-freshly laundered” garments during the Nine Days.
* Swim or bathe for pleasure.
* Remodel or expand a home.
* Plant trees to be used for shade or fragrance (as opposed to fruit trees).
*Buy, sew, weave or knit new clothing—even if they will only be worn after the Nine Days. Exceptions to this rule: a) If you will miss a major sale, or if the garment will be unavailable later. b) For the purpose of a mitzvah, e.g., purchasing new clothing for a bride and groom.
* Cut nails during the actual week of the fast of Tisha B’Av—i.e., starting from the Saturday night before the fast until the conclusion of the Nine Days.