Hi Hien, welcome to planDisney!
Thanks for your question, I can help!
When purchasing your 1-day tickets through the
Disneyland Resort website, you will be asked to select a specific reservation date. One reason for this is because the Disneyland Resort uses a
ticketing tier system for
standard one-day theme park tickets. This means the price of the ticket will vary depending on the
theme park reservation date that you select. Tickets currently range from Tier 1 to Tier 6. Tier 1 has the most restrictions in terms of eligible reservation dates and Tier 6 has the least number of restrictions. The ticket that you purchase will be valid for admission on the date you selected and on dates in the same or lower tier. This gives you the flexibility to change your reservations yourself from within your Disneyland Resort account. However, changing your reservations from a higher Tier day to a lower Tier day will not result in a refund of the ticket price difference.
And your Guest can certainly upgrade their tickets to a Park Hopper ticket later on! They can do this by either visiting the Disneyland Resort Ticket Booths or by calling the
Disneyland Resort Ticket Line at 714-781-4636.
I hope that helps!
See ya real soon!
Jin