Hey, David!
Welcome to the Disney Parks Moms Panel! I am so glad you asked this question because Guests frequently think their tickets last longer than the 999 Happy Haunts in the Haunted Mansion.
Walt Disney World theme park
tickets expire 14 days after the first use. For example, if you have an 8-day ticket then you may use those tickets within any consecutive 14-day period. After the 14-day mark any unused admissions will be lost forever so please plan accordingly. The rules are slightly different for Florida residents with certain tickets. Here is the exact language.
"Tickets and any options purchased must be used within 14 days of first use, except for Florida Resident 3-Day and 4-Day Tickets. Florida Resident 3-Day and 4-Day Tickets expire 6 months after first use or December 17, 2017, whichever comes first, and may not be used on the following blockout dates: June 6, 2016 to August 11, 2016; December 15, 2016 to December 31; 2016; January 1, 2017 to January 2, 2017; April 8, 2017 to April 21, 2017; June 5, 2017 to August 10, 2017."
Disney Dad Tip: If you are attending a special party such as
Mickey's Not-So-Scary Halloween Party or
Mickey's Very Merry Christmas Party you may usually get into Magic Kingdom Park at 4:00 p.m. and stay till the party ends at midnight. Tickets for these events are less expensive than a full day ticket, give you great access to attractions while attending a fun party with lower crowds. A simple way to enjoy all the magic for a little less.
Please let me know if you have any further questions.
David, enjoy making many Magical Memories!
~Jason °O°