You don’t need to be a rocket scientist to predict that Disney (NYSE:DIS) will be boosting ticket prices soon at its largest theme park resort. Disney World has increased its one-day admission rates every year since 1988, and stretching that annual streak to 30 is a no-brainer.

The last four hikes have taken place in February — on a Sunday morning — so it wouldn’t be a shock to see prices go up as early as this weekend. There are some good reasons why Disney may want to hold back on a material increase this time around, but you don’t buck tradition when there are bucks to be made. If you’re going to spend a day at Disney World soon, you may want to prepurchase that ticket no later than Saturday.