Hi Samantha! Welcome to planDisney! Thanks so much for stopping by to ask this great question.
I'm so sorry to hear that your time at the theme parks was cut short due to illness. I hope that otherwise, the rest of your vacation at the Disneyland Resort was magical!
Multi-day Tickets must be used within 13 days of first use, so unfortunately, your unused day will expire and cannot be used beyond this time frame. I'm sorry. I know this isn't the news you had hoped for. If it helps to know, the current price difference between a 4-day and 5-day theme park ticket is $20 (pricing subject to change).
I hope you can experience the magic of
The Happiest Place on Earth again in the future. If you have planning questions, please visit us again at
planDisney. You've got a friend in us and we would love to help!
Wishing you magic,
Lisa