SeaWorld’s current holiday page announces Christmas Celebration on select dates November 6–January 4, with lights, shows and seasonal food.
The celebration is included with park admission; upgrades cost extra. Confirm your date and entertainment schedule on the official park calendar before going.
The park’s entertainment page lists Sea of Trees, Winter Wonderland on Ice, O Wondrous Night and the Sesame Street Christmas Parade among the seasonal offerings. Fireworks are listed at park close on celebration nights through December 31.
Admission and a complete evening budget are different things: optional public ice skating has an additional charge and includes skate rental. Dinner with Santa and other upgrades also need separate planning. Choose a few priority shows first, then fit food and rides around the published performance times rather than assuming every attraction operates continuously.