Settling on a single day to celebrate emancipation was further complicated by the variety of dates on which actual freedom, or word of it, came to the slaves: for example, slavery ended on April 16, 1862 in Washington, but it didn’t come to Virginia until April 3, 1865; word of the war’s end and emancipation didn’t reach Texas until June 19, 1865, a day celebrated as “Juneteenth.” Some areas marked Feb. 1, 1865, when Lincoln signed the joint resolution approving the 13th Amendment. As a result, local traditions took the place of a nationwide anniversary.

But those local traditions don’t preclude a national observation. Indeed, today’s sesquicentennial of the Emancipation Proclamation provides an opportunity to observe Jan. 1 as a day of emancipation and to rededicate ourselves to freedom. In 1963, standing before the Lincoln Memorial, the Rev. Dr. Martin Luther King Jr. labeled the Proclamation a “beacon light of hope” to African-Americans and used the centennial to call for a renewed commitment to civil rights in America. Fifty years later, we might consider what a new Emancipation Proclamation would look like, one written for our times.

It would, above all, focus American and international attention on the millions of people still held in servitude. In September, the Frederick Douglass Family Foundation, an organization devoted to securing personal freedom and rights for all individuals, began a project called 100 Days to Freedom. Students in schools across the country were invited to craft a New Proclamation of Freedom, which the foundation hopes will be signed by President Obama on Jan. 11, which is recognized worldwide as Human Trafficking Awareness Day.

In the United States, thousands are held against their will; minors, especially, are the victims of ruthless exploitation. While other countries are worse offenders, the United States, according to State Department reports, serves as both a source and a destination for the trafficking of children.

In a speech delivered in September at the Clinton Global Initiative, President Obama declared that the time had come to call human trafficking by its rightful name: modern slavery. “The bitter truth is that trafficking also goes on right here, in the United States,” he declared. “It’s the migrant worker unable to pay off the debt to his trafficker. The man, lured here with the promise of a job, his documents then taken, and forced to work endless hours in a kitchen. The teenage girl, beaten, forced to walk the streets. This should not be happening in the United States of America.”