Linus Pauling Day is observed annually on February 28, commemorating the achievements of scientist, health advocate, and peace activist Linus Pauling, who was born in Portland, Oregon. Known for his significant contributions to chemistry and biochemistry, particularly in understanding chemical bonds, Pauling is recognized as the father of molecular biology. He won two Nobel Prizes, one for Chemistry and another for his efforts against nuclear weapons. Oregon State University honors his legacy each year on his birthday, celebrating his impact on science and advocacy. Typical customs may include educational activities and discussions highlighting his scientific breakthroughs and peace activism.