The diagnostic criteria for persistent depressive disorder are that you have depressive symptoms for more than two years that do not subside more than 60 days. https://bestpractice.bmj.com/topics/en-gb/805
It’s actually worse in some ways than major depression, and often includes episodes of major depression. The prognosis is worse; it’s often undiagnosed; and it’s poorly studied.
It's British, it's much shorter but hits harder, probably won't be extended, and a few years after it's last seen in public all records of it will be destroyed
