January 11 Holidays

International Thank-You Day celebrates gratitude as a social and neurological practice — positive psychology research links expressing genuine thanks to increased dopamine and serotonin in both giver and recipient. National Milk Day marks January 11, 1878, when the first home milk delivery was made in Brooklyn, New York — the beginning of the glass-bottle doorstep system that supplied American households for nearly a century. International Parity at Work Day advocates for equal compensation regardless of gender — U.S. women earn a median $0.82 for every dollar earned by men, a gap widening for women of color. Heritage Treasures Day celebrates and advocates for protecting cultural heritage — the artifacts, buildings, and traditions that communities inherit and must pass forward.