1903 On April 8, 1903, President Theodore Roosevelt started his Yellowstone excursion. He would travel through the Park for two weeks. An article about the trip can be found at http://www.greateryellowstonescience.org/sites/default/files/references/YS_15_1_Johnston_sm.pdf
1909 In April, 1909, a four man crew in a Thomas Flyer "Pathfinder Car" crossed the country laying out a route for the New York to Seattle "ocean to ocean" automobile race that was to be held that summer. This was the famous Thomas Flyer vehicle that had won the New York to Paris race the previous year. In Wyoming the crew followed the route of the Overland Trail. It created a lot of interest and was reported in the Wyoming newspapers of the time. The crew left Kansas City in the Thomas Flyer on April 8 (Laramie Boomerang, April 8, 1909)
1914 Weston Post Office was established on April 8, 1914 with Weston S. Harvey as its postmaster.