How often is the Jubilee and what is the Jubilee?

Answer From The Annual Reading Schedule - Week 30 Notes For Leviticus: Once every 50 years there is a "year of Jubilee". This year of Jubilee is when everyone would get their land returned back to them from anyone they sold it to (with some exceptions) (Leviticus 27:17-24). The purpose of them getting their land returned back to them from the person they sold it to was so that the tribes of Yisra’el (Israel) would maintain their inheritance of their land. For example: What if one tribe became very, very poor and had to sell all their land? Would they then never have any land for their children and forever be homeless and servants of other tribes? The year of the Jubilee made sure that no tribe ever ended up in this situation. See related verses at the end of these study notes for "Jubilee" and the reading notes for Week 29 of the Annual Reading Schedule, specifically the question "What is one of the main purposes of the year of Jubilee?".