https://www.siliconvalley.com/2022/07/27/knotts-berry-farm-expands-weekend-chaperone-policy-may-add-weekdays/

Knott’s Berry Farm has tacked on an additional day to its new weekend chaperone policy that went into effect after multiple fights broke out involving teenagers and may extend age restrictions even further to help restore order and confidence at the Buena Park theme park.

Under the updated policy, all visitors 17 years old or younger must be accompanied by a chaperone at least 21 years old on Fridays, Saturdays and Sundays to enter the Knott’s Berry Farm theme park or Knott’s Soak City water park.