[1] Hart High School was formerly the host of the Hart Invitational Quiz Bowl, a quiz bowl competition for teams from Los Angeles, Orange, Riverside, and San Bernardino counties.

In June 2020, some students urged principal Jason d'Autremont to discontinue the mascot, which they characterized as outdated and offensive.

[6] On July 14, 2021, the board of the William S. Hart Union High School District voted 4-1 to retire the mascot by 2025.

[7] On March 19, 2024, after an election amongst staff and students, it was decided that the new mascot would be the Hawks, starting with the 2024-25 school year.

[8] Film composer Paul Hertzog formerly worked at Hart as the AP Music Theory teacher.