I’m not saying they didn’t expect at least a delayed opening, just that extending 2020 passes to include 2021 might have been driven more by cost and complexity than a belief/knowledge that 2020 is not going to happen. Even at Knott’s Berry Farm passes are tied to the calendar year. Extending passes based on the park’s lost days would mean adding different expiration dates for each park’s passes and figuring out how to extend Platinum Passes. They might have determined it would be cheaper and easier to just add 2021 rather than figure out how to extend by days and then communicate that and any possible changes clearly.