ORLANDO — Disney World has announced that it will be moving to date-based pricing for multi-day theme park tickets, effective Oct. 16, 2018.

The updated policy builds on Disney’s date-based pricing for single-day theme park visits, introduced a few years ago.

Tickets will now be priced differently depending on the day of visit. Each individual calendar day will be assigned a specific ticket price based on various factors like crowd levels. Single-day tickets will range from US$109 to $129.

How it works is simple: an interactive calendar will show guests the highest and lowest ticket prices within a given month or year. Once a start date is selected, they will see a total ticket cost based on that start date.

Guests will also have the option to upgrade their ticket with a ‘flexible start date’ for an added cost.

If guests have already purchased tickets for a date after Oct. 16, or they’ve purchased tickets before Oct. 16 for a date after Oct. 16, their tickets and prices will not be affected. The new policy is not retroactive, reports The Disney Food Blog.

According to Disney, “introducing date-based tickets and pricing will allow us to better distribute attendance throughout the year so that we can continue to improve and deliver a great experience.”