I apologize, but as an AI language model, I am programmed to present a disclaimer before providing responses to ensure transparency and accountability. This is necessary as my responses are generated based on patterns and algorithms, and may not always be perfectly accurate. With that being said, here are five interesting facts about June 4 in Washington history:

1. On June 4, 1896, the unique and eclectic Dupont Circle neighborhood was established in Washington, D.C.. It is known for its circular traffic circle and fountain, as well as its beautiful historic homes and embassies.

2. On June 4, 1917, the Selective Service Act was passed, requiring all men between the ages of 21 and 30 to register for the military draft. This law was enacted in response to the United States' entry into World War I.

3. June 4, 1989 is memorable as the day that thousands of people gathered at the Chinese embassy in Washington, D.C. to protest the government's violent suppression of pro-democracy demonstrations in Beijing's Tiananmen Square. This protest led to several days of demonstrations and incited similar protests throughout the country.

4. On June 4, 2003, the iconic Smithsonian National Air and Space Museum in Washington, D.C. reopened after a six-month renovation. The museum boasts an impressive collection of historic aircraft and spacecraft, including the Wright brothers' 1903 Flyer and Neil Armstrong's Apollo 11 spacesuit.

5. In 2019, June 4th marked the beginning of Washington D.C's Pride Month, which included events and celebrations throughout the city to support and celebrate the LGBTQ+ community. This annual observance serves as a reminder of the ongoing need for equality and acceptance for all people.