Alton Towers has cut 26 days from its 2016 operating calendar, following a year of heavy visitor losses caused by the Smiler accident.
The theme park will remain closed during term-time Tuesdays and Wednesdays in April, May, September, October and November.
It has also been confirmed that the Staffordshire attraction will not open its doors during February half-term for the first time in several years.
The fireworks event, typically stretching over the final three days of the season, will also not take place on the Friday, becoming a two-day event.
The park will instead remain closed between 1 and 4 November, before ending its season with fireworks on 5 and 6 of the month.
The Halloween Scarefest event will also not return during the first term-time week seen in previous years, instead operating during the weekends of 8/9 and 15/16 October, followed by the half-term week of 21-31 October.
Actual opening hours for each day of the theme park’s operating calendar have not yet been confirmed.
The cuts are similar to those already announced at fellow Merlin Entertainments-operated theme parks Chessington World of Adventures and Thorpe Park.
The company has seen considerable falls in attendances at its UK theme parks following the Smiler rollercoaster accident at Alton Towers on 2 June, which seriously injured five people.
Alton Towers 2016 in-season closure dates in full
April: 19, 20, 26, 27
May: 10, 11, 17, 18, 24, 25
September: 6, 7, 13, 14, 20, 21, 27, 28
October: 4, 5, 11, 12
November: 1, 2, 3, 4