I don’t know the song and I went to Sunday school.
The thing I find more strange is all this American attention to a royal wedding. That really is a lack of knowledge of history. Our founding fathers are spinning in their graves.
I don’t remember that particular hymn but there are plenty of others I do know well like Onward Christian Soldiers. (My grandfather’s favorite)
I paid attention because I am fascinated by the detail and precision and the participation. We have little in our society that matches it. I would say SOME exceptions were the funerals for John Kennnedy and Ronald Reagan.