2 Halloween.
Why it should be a public holiday: It’s hard to focus on school or work when people are dressed in costumes… Halloween is becoming bigger and bigger and the demand for more formal recognition is coming… parents currently have to rush home to take kids trick-or-treating.
Why it should not be a public holiday: Other proposals make more sense, like officially moving Halloween to the last Saturday in October instead of celebrating on the 31st… without office costume contests on Halloween, how else could you figure out which of your coworkers are secretly deviants?