1. On February 28, 1913, the first labor strike in Oregon's history began in the city of La Grande. Workers demanded a nine-hour workday instead of the current 10-hour workday. The strike lasted for over two months, and it led to the establishment of Oregon's first minimum wage law.

2. In 1854, the first post office in Oregon City was established on February 28. The post office was initially located in the home of the town's founder, John McLoughlin, but it was later moved to a more central location.

3. On February 28, 1954, the Oregon state legislature passed a bill officially adopting the Oregon state flag. The flag features a navy blue background with a gold shield in the center, surrounded by 33 stars representing Oregon's admission as the 33rd state in the US.

4. The Oregon Trail, one of the most famous overland routes in American history, passed through Oregon on February 28 for many years. Thousands of pioneers traveled the trail in the mid-1800s, hoping to make a new life in the West.

5. In 2012, the city of Portland celebrated the opening of the Tilikum Crossing, a new pedestrian and transit-only bridge over the Willamette River. The bridge opened on February 28, and it was the first new bridge over the river in over 40 years. The bridge's name comes from the Chinook word for "people" or "friends."