The Trump administration has made some changes to the National Park Service's free days, removing holidays that have been on the list for years and adding new ones.

Two of the removed holidays celebrate Black history: Martin Luther King Jr. Day, honoring the work of the civil rights leader who advocated to end racism and segregation; and Juneteenth, the holiday that commemorates the day the last group of enslaved people learned they were free after the Union won the Civil War.

President Donald Trump has made rolling back diversity, equity and inclusion a key priority of his second administration. The Department of the Interior did not respond to requests for comments on explaining the changes to the NPS fee-free days, though, removing the Black history holidays has drawn criticism.

Here is what to know about the changes:

More: Americans react to national parks ditching free entry on Juneteenth, MLK Day