We never did anything major during the "Nine Days", and generally not even during the "Three Weeks". Not major purchases, not trips or major events. It was always considered something that would bring "bad luck" of sorts. I remember when someone close to the family bought a car during the Three Weeks - family members pleaded with her to wait, but she bought the car. That car was in a number of accidents, besides for often breaking down. While it might have just been a lousy car and she a lousy driver, family members always blamed it her having bought it during the Three Weeks.