Here's information from Touring Plans about phased closures and when they have happened:
Phase 1 Closure
Casual visitors are turned away at the automobile toll plazas. This means that people without tickets, those with one-day, single-park tickets, and those intending to use cast member passes will not be allowed to park.
Other guests may enter such as:
- Those with multi-day or multi-park tickets
- Those staying at a Disney Resort
- Annual Passholders
- Those re-entering the park that day.
- Those "hopping" from another park.
- Those with in-park reservations or appointments.
- Those arriving via Disney transportation
The following are dates within the past 10 years when Walt Disney World parks have reached, yet not gone past, a Phase 1 capacity closure:
- Magic Kingdom: December 25, 26, and 29, 2014; December 31, 2015; December 31, 2017
Phase 2 Closure
The only guests allowed through the turnstiles and into the parking lots are:
- Those staying at a Disney Resort
- Annual Passholders
- Those re-entering the park that day.
- Those "hopping" from another park.
- Those with in-park reservations or appointments.
- Those arriving via Disney transportation
The following are dates within the past 10 years when Walt Disney World parks have reached, yet not gone past, a Phase 2 capacity closure:
- Magic Kingdom: April 8 and 9, 2009; December 28 and 30, 2009; December 29, 2010; December 25 and 28, 2011; December 24, 25, and 30, 2012; December 25 and 30, 2013; July 4, 2014; December 31, 2014.
- Hollywood Studios: December 29, 2009 and December 28, 2011
- Animal Kingdom: December 28, 2009 and December 28, 2011
Phase 3 Closure
The only guests allowed through the turnstiles and into the parking lots are:
- Those staying at a Disney Resort
- Annual Passholders
- Those with in-park reservations or appointments.
The following are dates within the past 10 years when Walt Disney World parks have reached, yet not gone past, a Phase 3 capacity closure:
- Magic Kingdom: April 7, 2009; December 29 and 31, 2009; March 30, 2010; December 25 and 31, 2010; December 31, 2011; December 27, 28, and 31, 2012; January 2, 2013; March 25-28, 2013; July 4, 2013; December 31, 2013.
Phase 4 Closure
The park and parking lot are closed to all arriving guests. The only Phase 4 Closure in the past 10 years has been Magic Kingdom on April 7, 2009.