ANDREWS MCMEEL ALMANACToday is the 18th day of 2021 and the 29th day of winter. In 1993, Martin Luther King Jr. Day was officially observed in all 50 states for the first time. TODAY'S FACT: Australia is the world's sixth-largest country by area, at 2.97 million square miles. -- Baron de MontesquieuTODAY'S NUMBER: 582,578 -- square miles of Pacific Ocean encompassed by the Papahanaumokuakea Marine National Monument, initially established at 139,797 square miles by President George W. Bush in June 2006 and expanded to its current size by President Barack Obama in 2016. TODAY'S MOON: Between new moon (Jan. 12) and first quarter moon (Jan 20).