Enneadecaphobia

Enneadecaphobia (from Greek ennea, "nine" and deca, "ten") also known as nonadecaphobia is the fear of number 19. Sufferers of enneadecaphobia tend to write 1999 as 1899 or just 99.

Why 19 is scary

 * 19 was the number of bad luck before 13 was in ancient times.
 * It's still a terrible teen.
 * Two world wars happened in the 1900s.