Kate Middleton broke Princess Alexandra's 1901 custom for her children.

On St. Patrick's Day, shamrocks were presented to the first Battalion Irish Guards.

Kate and William married in 2011, and she has attended every event since.

Kate refused to give shamrocks to the Irish Guards in 2016, according to Kensington Palace.

Kate broke with tradition so that she could spend more time with her kids.

Kate attended St. Patrick's Day events with Prince William and the Irish Guards, showing her royal duty.

Kate has taken over as Colonel Irish Guards from Prince William.

The Princess of Wales is well-known for being an involved mother to her children.

Kate's focus on her children is a nice break from royal tradition because it shows that she cares about her family.