There are a number of saints named Katharine, Katherine or Catherine so you need to be more specific for an answer to be given.
The feast day of Catherine of Siena is April 29.
Catherine MacCauley is not yet canonized saint.
There are many, many saints named Catherine or Catharine. However, the feast of St. Catherine of Siena is on April 29.
The name Catherine is celebrated as a Saint Day on the 25th of November by the Catholic Church in honor of St. Catherine of Alexandria
April 29 is the feast day of Saint Catherine of Siena, a patron saint of Italy.
It is November 25.November 25th
Apart from attending Mass, her feast day is probably not celebrated by Catholics in the USA.
because she is I go to St Catherines of Bologna school her feast day is May 9
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.