1. On August 27, 1904, the first Oklahoma State Fair opened in Oklahoma City, attracting over 10,000 visitors. The fair has since become an annual tradition in Oklahoma, featuring livestock shows, carnival rides, and entertainment.

2. In 1918, on August 27, the deadliest race riot in American history occurred in Tulsa, Oklahoma. The violence erupted after a black man was accused of assaulting a white woman and escalated into a two-day massacre that resulted in the deaths of at least 300 black residents and the destruction of the Greenwood District, a thriving black business community.

3. August 27, 1923, marked the birth of legendary country singer and songwriter, Ira Louvin. He became part of the popular singing duo, The Louvin Brothers, with his brother Charlie. The duo had dozens of hits during the 1950s and 60s, including "When I Stop Dreaming" and "I Don't Believe You've Met My Baby."

4. On August 27, 1975, Ross Thomas, an Oklahoma City-based writer, won the Edgar Award for Best Novel for his mystery thriller "The Fools in Town Are On Our Side." He went on to win the prestigious award again in 1985 for his novel "Briarpatch."

5. August 27, 2011, marked the first-ever Oklahoma Pride Parade in Oklahoma City. The event celebrated and promoted the LGBTQ+ community in Oklahoma and has since become an annual tradition, attracting thousands of attendees from across the state.