If you go on Saturday, you can go Sunday,Monday, Tuesday, Wednesday, Thursday, AND Friday if you wish.
You have the next 6 days to go back for a full week worth of Sea World.
I purchased tickets online using the PEPSI code and went to the office at the front to get the tickets to be able to return. We went the first day first thing in the morning until about 2, came back another day about 2 to closing to see the evening shows. Then returned one last time for about 4 hours before our flight left and redid a few things we liked.
ADVICE, Take it or leave it: Don't wait until the end of the evening to try and get your tickets to come back. The line is sooooo long and you're tired. Do it at some random point in the day.