No, not to the United States (although a heartfelt Happy Birthday to them too), but to the current, fifty-star US flag, which hit its 47th anniversary yesterday. Today, it turned 47 years and one day.
The big deal? Well, the longest the flag had gone without changing before today was 1912-1959, forty-seven years for the forty-eight star flag. And the current flag, the twenty-seventh, just beat that.
Me, I'm holding out for the fiftieth anniversary. See ya then!