There Is No 'Last Day' of Unschooling

My Instagram feed fills this time of year with photos announcing the last day of school, for both homeschoolers and conventional schoolers alike. These photos are vivid reminders of how different unschooling is from standard schooling or school-at-home. With unschooling, there is no beginning and end, no start and stop. I can't even imagine having a "last day of the school year" photo for my kids. What would it look like? The last day of what?