My understanding is that it was in 1946, but I kinda doubt it.
Answers (1)
Hi There,
I couldnt find any reputable source that could confirm anything but it being originated in 1946.
From Wikipedia "UNICEF was created by the United Nations General Assembly on 11 December 1946, to provide emergency food and healthcare to children in countries that had been devastated by World War II. The Polish physician Ludwik Rajchman is widely regarded as the founder of UNICEF and served as its first chairman from 1946. "