1. On June 25, 1798, Vermont became the first state to abolish slavery in its constitution. The state had previously prohibited the importation of slaves, but this new provision freed all slaves within the state.

2. In 1867, the Vermont Central Railroad opened a new line from Burlington to Montpelier, greatly improving transportation and commerce throughout the state. The line became an important part of Vermont's economy, particularly in the years following the Civil War.

3. The Vermont State Fair has been held annually in Rutland since 1846, and June 25 in 1890 marked the opening day of the fair's 44th year. The event has become a beloved tradition in the state, featuring carnival rides, agricultural exhibits, and live music.

4. On June 25, 1927, Vermont's first radio station, WCAX, began broadcasting from Burlington. The station was owned by the Champlain Broadcasting Corporation and primarily featured music and news programming.

5. In 2002, Vermont became the first state to pass legislation legalizing civil unions for same-sex couples. Governor Howard Dean signed the bill into law on June 25, and the move was seen as a major victory for the LGBTQ+ community. The state later passed a law legalizing same-sex marriage in 2009.