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| Written by | Suzanne Weyn |
| Illustrator | John Lund |
| Published | 1999 |
| Publisher | Random House |
| Series | A Random House PICTUREBACK |
| ISBN | 0375801332 |
Happy Grouchy Day is an Elmo in Grouchland tie-in storybook.
Grizzy is nicer than the other Grouches, and gets kicked out of class for good manners. Elmo and Oscar help her become more grouchy so that she can live peacefully in Grouchland.