Disneyland unveiled the ticket calendar for the first two months after the upcoming reopening on April 30, following a year-long closure due to the COVID-19 pandemic.

Tickets for both Disneyland and Disney California Adventure are available on Thursday, April 15th.
Reservations are required to visit the park. Bookings open on April 12 for guests who have previously purchased tickets. The parks will operate with limited capacity, and reservations are a first-come-first-served basis. Guests must have already purchased a ticket to book.
At present, only California residents are allowed to purchase tickets and visit the parks.

The previous five-level pricing system will be in effect without increasing the ticket price. Parkhopper tickets are available at a higher cost.
To see the availability of the park for each level, Disney provided a complete calendar. Note that this calendar does not show the booking ability, but only the validity of the ticket. The booking calendar has not yet been announced, but the parking hours have been updated to 28 June.
Tickets are available in a 60-day window starting with the resort reopening on April 30th.

Disney has provided a handy guide for guests with tickets previously purchased to identify their ticket level. Level upgrades are currently unavailable.
Follow WDWNT and DLNT for more coverage of the reopening of Disneyland.