Hi there, Howard! Thanks for bringing your question to planDisney!
With your
Park Hopper tickets, you made theme park reservations for the park you want to start at each day. Although the reservation says "All Day" you will be able to park hop starting at 1:00 p.m. To double check your ticket and reservations, click the "Tickets and Reservations Details" link under the "My Disneyland" menu on the Disneyland Resort website. Your tickets should have an indication that they are Park Hoppers.
Park Hopping provides maximum flexibility to your day. You can start off riding all the classic attractions in Disneyland Park like Pirates of the Caribbean, Peter Pan's Flight, and Jungle Cruise, but then have fabulous dinner at
Lamplight Lounge in Disney California Adventure Park. Finally, you could hop back over to Disneyland Park at the end of the day to enjoy the fireworks.
I hope you have a wonderful time at the Happiest Place on Earth!
-Linda