National Hat Day is Jan. 15; but there is also an International Hat Day, Red Hat Day, Felt Hat Day, Silly Hat Day and hat days celebrated in Australia and elsewhere.
The biggest hat sales occur for these holidays: St. Patrick’s Day, Independence Day, New Year’s, Christmas, Easter.
Over 1 million hats are worn at California beaches on the most popular beach days of the year. The hats range from ball caps and sun hats to straw lifeguard style hats.