4 ms·

That's pretty useless as a mnemonic. "30 days hath September, August, March and December" fits the pattern equally well.

• webhat 12y ago
  Not if you remember the whole rhyme: Thirty days have September, April, June, and November. All the rest have 31, Except February alone, And that has 28 days clear, And 29 in a leap year.
  • mansr 12y ago
    My substitution works without contradictions there too.