Hello there, friend!
Welcome to planDisney! I'm excited that you're starting a fresh new year with some magical plans at the Disneyland Resort.
Guests who have already purchased
One-Park-Per-Day Tickets and want to change them to
Park Hopper Tickets can visit a Disneyland Ticket Booth just outside the parks in the esplanade to purchase that upgrade. However, the Park Hopping feature is purchased by ticket, not by day, so it is not possible to add Park Hopping for just one day. If you decide to park hop you'll want to do it at the beginning of your visit so you can enjoy that feature each day of your multi-day ticket!
My own park touring style changes depending on who I'm visiting with, how long I will be there, and what we are planning to do! Sometimes we opt for One-Park-Per-Day Tickets to enjoy a more relaxed pace, which is really nice. But if it's a quick trip and you want to see as much as you possibly can then having Park Hopper Tickets helps make that possible!
If you have any other questions about your theme park tickets there's also a
Tickets phone number available for guests where a Cast Member can answer any questions you have about upgrades, Park Hopping, and other ticketing topics. Don't hesitate to reach out if you need more help!
Keep moving forward!
Amanda