Happy Pioneer Day! Prosperity July 24, 2016 Happy Pioneer Day Provo! In honor of our State’s holiday, I thought it would be fun to share a series of historical photos with you. Check out the images below and take a look back at the growth of Pioneer Day in Provo. President Taft standing in an automobile that is driving through Provo on Pioneer Day. Cancel reply CommentName Email* Website* Notify me of follow-up comments by email. Notify me of new posts by email.