ESA's own website doesn't mention any such thing as of 2021-09-18: https://www.esa.int/Science_Exploration/Space_Science/Webb/ https://www.esa.int/Science_Explo

ESA's own website doesn't mention any such thing as of 2021-09-18: https://www.esa.int/Science_Exploration/Space_Science/Webb/ https://www.esa.int/Science_Exploration/Space_Science/Webb/ "Launch date: 18 December 2021" This seems like the sort of thing they would take some trouble to keep up to date. Got a source I can trust more than some random YouTube video?