I like the sound of hath over has anyway. More poetic when it comes to rhyme.
If I can recite little bits of Shakespeare here and there, I can remember a short rhyme about months. Granted, I remembered the month rhyme before I was memorizing Shakespeare. Perhaps it's my artsy dominating Right brain.....art and language and all. Sticks more than counting knuckles. Numbers are too left brain and logical/analytical.