Only Have One Day at Disneyland? Yes, It Is Possible to Do Both Parks

I cannot stress this enough. It's one day in your life; you can get up early. Double check the times both parks open so you can plan where to start accordingly (times vary based on day of the week and seasonality, not to mention Magic Hours). You will never regret being at the park when it opens, but you will regret arriving at noon with every other family of screaming children. Every hour that passes, more people arrive, so the early mornings are golden. You'll thank me later.