1. In 1887, the first Labor Day parades were held in Chicago to celebrate the achievements of the workers' movement. The day was established as a national holiday in 1894.

2. On November 30, 1930, Chicago's famous Navy Pier opened to the public. The pier, which was once used by the Navy as a training center during World War II, is now a popular tourist destination with restaurants, shops, and attractions.

3. In 1941, the Illinois State Capitol building in Springfield was damaged by a fire. The blaze began in the House of Representatives chamber and caused extensive damage to the historic building.

4. November 30, 1954, marked the inauguration of the Chicago Transit Authority (CTA), which took over the city's public transportation system. The CTA, which operates buses and trains, is one of the largest public transit agencies in the country.

5. The John Hancock Center, one of Chicago's most iconic skyscrapers, was completed on November 30, 1968. The building, which stands at 100 stories tall, was the tallest building in the world outside of New York City at the time of its completion.