In the USA, Feb 1st has been celebrated by and for slaves and prisoners for 73 years. Here is a page on the creation of the holiday: https://www.presidency.ucsb.edu/documents/proclamation-2824-national-freedom... . The holiday commemorates the day Abraham Lincoln signed the law abolishing slavery 156 years ago. The law outlaws slavery in every place that is subject to the jurisdiction of the united states. I don't know what a comparable international holiday is, but if you don't live in the USA and would like such a holiday, it is probably fine to celebrate our holiday. People still experiencing slavery here in the USA would likely appreciate the solidarity. And free people from the USA often do what they can to help slaves from other countries, bringing them to our human trafficking freedom organisations to be protected. A problem with slavery within capitalism is that by treating the enslavement of human beings as capital somebody could invest in and grow, an individual can outcompete people who don't do this. This produces a competitive trend towards universal slavery, which is abhorrent. Slaves experience torture and harm the likes of which are unimaginable to free people. Their free will and health are valued only for the purpose of their slavery. They can lose body parts, for example, as a way to limit their freedom, and be required to continue doing work while partially dismembered. If this is limited in public, there are still reasons it can be a competitive advantage to do it in private. Slavery is a trend produced by ignoring moral boundaries when engaging competitive economics. In an anarchist economy, we must all be activists, to protect what is crucial. Feb 1st will be a great time to spread efforts and contribute work towards liberating people of any kind.