The words  to “Thirty days hath September” are still used by many adults to prompt them into recalling how many days there are in each month! It’s therefore often referred to as the Days of the Month Rhyme! The origin  of the lyrics to “Thirty days hath September” are obscure but use of olde English can date this poem back to at least the 16th century. 

Click on the following image to listen and read the poem.

 And here you can listen to another version: