Lee National Denim Day is observed worldwide First Friday of October every year to support breast cancer research and education. Participants typically wear denim as a symbol of solidarity and contribute to fundraising efforts for the cause. The event was initiated by the Lee Jeans brand in 1996, aiming to promote awareness and support for breast cancer initiatives. Organizations and individuals come together to participate in various activities, including fundraising campaigns and community events, to further the mission of combating breast cancer. The day serves as a reminder of the ongoing fight against the disease and the importance of research and education in improving outcomes for those affected.