1. Oregon was officially admitted as a state on March 19, 1859. This day marks a significant milestone in Oregon's history as it became the 33rd state of the United States.

2. On March 19, 1937, President Franklin D. Roosevelt dedicated the Bonneville Dam on the Columbia River near Cascade Locks, Oregon. The dam is a major source of hydroelectric power and provides irrigation water to the region.

3. The first known UFO sighting in Oregon occurred on March 19, 1950. Two pilots flying from Pendleton to Salem reported seeing a "bright white light" that followed their plane for over 25 miles.

4. In 2003, the Oregon Supreme Court ruled on March 19 that same-sex couples are entitled to the same legal rights and protections as opposite-sex couples. This ruling paved the way for the eventual legalization of same-sex marriage in Oregon.

5. March 19 is also celebrated as "Swallow Day" in Oregon, a holiday that honors the annual migration of the Vaux's swifts. Each year, thousands of these birds roost in the chimney of a school in Portland, and locals gather to watch the spectacle.