After a week or more of warm, early-spring rain on the moor around Misselthwaite Manor, one morning Mary wakes to find her world a bit different:

     “It must be very early,” she said. “The little clouds are all pink and I’ve never seen the sky look like this. No one is up. I don’t even hear the stable boys.”
     A sudden thought made her scramble to her feet.
     “I can’t wait! I am going to see the garden!”
     She had learned to dress herself by this time and she put on her clothes in five minutes. She knew a small side door which she could unbolt herself and she flew downstairs in her stocking feet and put on her shoes in the hall. She unchained and unbolted and unlocked and when the door was open she sprang across the step with one bound, and there she was standing on the grass, which seemed to have turned green, and with the sun pouring down on her and warm sweet wafts about her and the fluting and twittering and singing coming from every bush and tree. She clasped her hands for pure joy and looked up in the sky and it was so blue and pink and pearly and white and flooded with springtime light that she felt as if she must flute and sing aloud herself and knew that thrushes and robins and skylarks could not possibly help it. She ran around the shrubs and paths toward the secret garden.

The Secret Garden, by Frances Hodgson Burnett
(emphasis added)

You can read the whole of The Secret Garden or just Chapter 15.