There is no saint named Isabel with a feast day of September 1.
Her feast is observed on November 13.
February 26.
Saint Jane Frances's feast day is currently celebrated in the Roman Catholic Calendar of saints on August 12.
There are many saints named Isabel so you need to be more specific.
Isabella de Castile has a case for beatification open but has not been declared a saint. Therefore, she has no feast day yet.
Pope Benedict I is not a saint and has no feast day.
Saint Maria Goretti's Feast Day is July 6th.
The feast day of saint Mark is April 25.
Saint Laura's Feast Day is October the 19th.
Saint Helena's feast day is August 18.
The 23rd of April is the feast day of Saint George.