Hi there, Zoe! Thanks for visiting the Disney Parks Moms Panel and asking your question!
Character dining at the Disneyland Resort is a blast and one of the few times where I can guarantee that my child will actually eat her meal. It has something to do with lots of options at the buffets to keep her interested and a fair amount of me telling her, "You better hurry and eat a few bites before Mickey makes it to our table!"
Goofy's Kitchen is always open for dinner and in fact, this is the only option for character dining during dinner time. The current Disney Dinnertime Magic is a special offering at Goofy's Kitchen only available through September 4, 2017. After that time, I presume that the restaurant will most likely go back to the standard dinner with Goofy and a few of his pals. I always recommend making dining reservations in advance and for character dining, as soon as you are able, which is 60 days in advance. You can make reservations online or by calling (714) 781-3463.
I hope this information was helpful. Have a wonderfully goofy time at the Disneyland Resort!
-Linda M.