1)
Is Father's Day celebrated by the nation?
Is
Father's or Mother's Day celebrated by the nation?
Whom
is Father's Day celebrated by?
What
Day is celebrated by the nation?
Father's
Day is celebrated by the nation, isn't it?
2)
Was Father's Day started in the twentieth century?
Was
Father's Day started in the 20th or 19th century?
When
was Father's Day started?
What
Day was started in the twentieth century?
Father's
Day was started in the twentieth century, wasn't it?