Final answer:
There isn't a specific documented event in Illinois in June of 1978 that is widely recognized. The mid-1970s did see a nationwide celebration of the United States' Bicentennial, and historical events like the annual Saint Patrick's Day Parade showcased Illinois' cultural vibrancy. The late 1970s also witnessed the rise of LGBTQ activism, culminating in the first March on Washington for LGBTQ rights in 1979.
Step-by-step explanation:
Illinois celebrated a special event in June of 1978 which is likely related to the historical events and cultural developments of the time. However, there is no prominent documentation of a specific statewide event that occurred in Illinois in June of 1978 that stands out as a significant celebration. Since there isn't a well-documented event that coincides specifically with that month and year in Illinois, we might consider broadening the timeframe or looking at significant events in nearby years. The mid-1970s overall marked the celebration of the United States' Bicentennial. The state of Illinois, with its rich history, undoubtedly participated in these nationwide festivities around the 200th anniversary of American independence from Great Britain.
In the context of the era, there were other notable events such as the annual Saint Patrick's Day Parade in Chicago, which was a significant event in the state's history and showed the mingling of ethnic, religious, and civic pride. Additionally, the late 1970s saw rising awareness and activism around LGBTQ rights, with the first March on Washington for LGBTQ rights taking place in 1979, indicating a growing visibility and celebration of LGBTQ identities.