In the latest of a series of publicity-seeking stunts and events, Alton Towers will offer admission for £13 on Friday 13 May.
Tickets, which represent a saving of more than £18 on the usual online price, can be booked at AltonTowers.com.
On Friday 13 August last year, the park re-named its latest rollercoaster from Thirteen to Fourteen.
With no major new ride or attraction for 2011, the Staffordshire-based theme park has been spending a considerable amount of time and money on increasing the park’s profile.
Publicity stunts have included opening the park a day early and with free admission for those checking in with Facebook Places and the commissioning of a gold carriage on Thirteen for the royal wedding.