A columnist is the writer or editor of a newspaper/magazine column. NCD was made to honor Ernie Pyle, a columnist killed in World War II.
For NPD, wear pink, cook pink things, do anything with the color pink! Both men and women can participate.
Hopefully, your boss will allow TYDWD. But seriously, what will your dog do when you're working? This wouldn't work out with my parents. . . They work at the post office.
So today, you must dress up in pink, bring your dog to work, and procrastinate by reading magazines and newspapers. That's nice.