When I was born, it was about 190th anniversary of the founding of the country. Then, when I was in elementary school, it was the 200th anniversary, and this year is finally the 249th anniversary. I have lived through roughly a quarter of the country's history in the same era.
This is purely my own personal experience, but the people of the country should not think that this sense is a one in seven billion. The same is happening to the other 7 billion people.
Congratulations, United States of America.