For many Disney fans, Halloween is considered one of the best times of the year to visit, often rivaling the Christmas season in terms of atmosphere and exclusive offerings. The parks undergo a massive transformation with "Halloween Time," featuring hundreds of hand-carved pumpkins on Main Street, U.S.A., and spooky overlays on popular rides, such as the Haunted Mansion Holiday (themed after The Nightmare Before Christmas) and Guardians of the Galaxy – Monsters After Dark. The flagship event is the Oogie Boogie Bash at Disney California Adventure, a separate-ticketed party that includes rare character meet-and-greets, "treat trails" with massive amounts of candy, and unique parades. Even if you don't attend the private party, the general ambiance, themed treats, and the "Halloween Screams" fireworks show make it "worth it" for those who love a festive, family-friendly spooky vibe. However, travelers should be aware that this is also one of the busiest and most expensive times to visit; crowds are consistently high throughout October, and Oogie Boogie Bash tickets often sell out within hours of going on sale months in advance, making early planning essential.