Abbott Elementary Season 4 premieres on October 9, 2024  at a new time on ABC. Season 4 Episode 15 are titled “100th Day of School” Here is the synopsis: “During Abbott’s 100th day of school celebrations, Barbara receives a surprise from her daughter. Melissa, Jacob and Mr. Johnson join forces to conduct a search party.” Don’t miss Abbott Elementary  “100th Day of School” airing Wednesday, February 26, 2025 at 8:30/7:30c on ABC. Synopsis Courtesy of ABC Entertainment Press Comments? Sound off below. Or tweet @thenerdygirlexp and @stacyamiller85 Related: