National Payton Slaymaker Day is observed on March 11 in honor of Payton Slaymaker, a young girl from Claypool, Indiana, who fought bravely against diffuse intrinsic pontine glioma (D.I.P.G.), a rare and aggressive brain cancer. Diagnosed at the age of 9, Payton's battle with the illness garnered widespread support and awareness across the United States, inspiring many with her courage. The day serves to commemorate her life and raise awareness about D.I.P.G. Following her passing, numerous tributes, fundraisers, and events have been held in her honor, reflecting the impact of her story on communities nationwide. Typical customs may include sharing her story, participating in fundraising events, and promoting awareness of childhood cancer.