Prince William posted a Mother's Day photo of Diana, with no message for Kate

Prince William was out and about on Saturday, attending a Six Nations match between Italy and Wales, with Wales defeating Italy. Apparently, it was the first time Wales won a rugby game in three years?? Crazy. I'm including some photos of William wearing a suit and tie at the game. Does he have to dress so formally for rugby? I mean, I could see why he would wear a sportcoat, but the tie is a bit too much. But the big news over the weekend is that it was Mother's Day in the UK. This has happened before, where Britain's Mother's Day (or "Mothering Sunday") falls on the Sunday of the . . .