Hiya Veronica!
Congratulations on your upcoming marriage!
You and your lucky Husband will be in Disney World during one of my favorite times. Not only will the crowds be low, the Holiday decorations are up, and the weather is pleasant during the day...although, mornings and evenings are a little chilly so a sweatshirt is handy.
During regular attendance periods the Theme Parks tend to be the busiest on the following days:
Magic Kingdom® Park: Monday, Thursday, and Saturday
Epcot®: Tuesday and Friday
Disney's Hollywood Studios™: Sunday and Wednesday
Disney's Animal Kingdom® Theme Park: Monday, Tuesday and Wednesday
I hope that you have a wonderful honeymoon and a long marriage full of happiness!