It has been accepted for centuries that a new century begins with “1” as there was no year zero. In America, January 1, 1801 was widely celebrated as the beginning of the 19th Century and January 1, 1901 as the beginning of the 20th. It all changed in the year 2000 when people started celebrating the new century a year early. Not taken from my personal beliefs, just reading historical works.
Thank you for adding that fascinating fact to this mundane, dull story.