National Senior Health & Fitness Day is celebrated on the last Wednesday in May, focusing on promoting health and fitness among seniors. Founded by the Mature Market Resource Center (MMRC), this day encourages older adults to engage in activities that enhance their physical well-being. Common customs include participating in local senior fitness events, organizing classes specifically for seniors, and volunteering at senior centers to support their health and fitness needs. Families and friends are encouraged to assist seniors by helping them find events, providing transportation, or accompanying them on walks. The day serves as a reminder of the importance of exercise and health in older age, with various organizations across the nation hosting activities tailored for seniors.