No documented founder or formal establishment record has been identified. The observance appears to have emerged informally online alongside similar name-day holidays in the early 2000s.
A Midcentury Phenomenon
By the 1940s, Susan had begun climbing American baby-name charts. It entered the SSA top 10 in 1945 and never left for a generation.
The streak lasted 24 consecutive years. At its peak in 1959 and 1960, it ranked second in the entire country, trailing only Mary.
The sheer volume was staggering. In a single year during the late 1950s, more than 45,000 newborn girls received the name. The result is a generation where knowing multiple Susans in the same classroom, office, or family was routine.



