Today is St. George's Day. St. George, the patron saint of England. You can read the history of this tradition at the website of the Woodlands Jr. School's page on St. George's Day. And if that isn't enough, and you are still wanting more in-depth information, the Britannia History page is very good.
St. George, Raphael
Another symbol of the day is the red rose. Here a London constable wears the rose on his helmet.