Fatto matematico: 958 is the number of labeled 3-colorable graphs with 5 vertices.
Trivia: 958 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: August 15th is the day in 1999 that Beni Ounif massacre in Algeria; some 29 people are killed at a false roadblock near the Moroccan border, leading to temporary tensions with Morocco.