Who wrote poem that says you Have to Go Bed by Day?

There's no widely known poem that specifically says "You have to go to bed by day". It's likely a phrase you've heard somewhere, but not from a famous poem.

However, there are many poems about sleep and nighttime:

* "The Sleep" by Edgar Allan Poe: Explores the themes of sleep, death, and dreams.

* "Hush, Little Baby" - Traditional lullaby: This gentle poem encourages a baby to sleep.

* "Night" by Henry Wadsworth Longfellow: Describes the tranquility and beauty of the night.

* "The Dream" by John Keats: Explores the power and mystery of dreams.

Perhaps you are thinking of a specific poem, or perhaps you have misremembered the words. If you can give me more details about the poem or its context, I might be able to help you find it.