The Romans added January and February to the calendar but ran into a problem — math and superstition. Here's why February ...
Story continues after photo gallery. February chosen to get an 'unlucky' amount of days Pompilius changed the months so they alternated from 29 to 31 days, and then left February as the exception ...
So he added January and February to the end of the calendar." The original Roman calendar divided the year from March to December into 10 months of either 29 or 31 days, based on lunar cycles ...