So, we're staying at Grand Cali next year, yep, 394 days away
Is it too early to book?
If new specials come out can I just ring them to apply them or do they do it automatically?
It does not hurt to call, but I think you may only book a year in advance.
I know that was the case when I booked for the Disneyland 50th anniversary (7 years ago).
Unless there is something extra special happening at the parks, you do not need to book the Grand this early.