Knott’s Berry Farm has just let Season Passholders know via tweet and email that passes will be extended. Originally, in 2020, they indicated that all 2020 passes would be good for a full year. Now, they are sharing that passes will be good for 2021 whenever it reopens, and there will be a “day-for-day” extension. This extension means that for every day the park is closed in 2021 passes will be good for 2022. Add-ons to passes will be extended for the same amount of time as well.
More information can be found on their site here.