Which Months Have 31 Days – A Simple Way To Remember

Use your knuckles to figure out which months have 31 days!

I don’t know about you, but as a kid I could never remember the rhyme that taught how many days there are in a month.  You know the one: “30 days has September”…  I was good with that part, but I couldn’t remember what came next.  Thankfully, at a young age, a school friend taught me this really easy trick to remember which months have 31 days.  Oh, I do love a simple trick that simplifies life just a little bit.

trick to remember which months have 31 days

Use the knuckle trick to remember which months have 31 days!

My younger son offered up his hand for these photos because, well… let’s just say there’s nothing quite like a close-up shot of your 40+ hand to make you realize you’re not quite as young as you feel.  If you don’t believe me try it.  Unless you’re a hand model, or under 30, you might be in for a surprise.  I was like “WHAT?  That’s not MY hand!  That’s my MOTHER’S hand!”  It wasn’t pretty folks, so thank you, Andrew, for stepping up and filling in!

Ok, you’re going to love this!  Your kids are going to love this!  Your friends are going to love this.  It’s so simple!


Make a fist:

Your fist can either face toward you or away from you.  For the sake of the photos, we have it facing us, because between you and me, the photo of Andrew’s fist facing away from the camera made it look like he had a mutant toad hand.

Tap your knuckles:

Now, all you do is tap each of your knuckles, and the wells in between, while reciting the months of the year.

knuckle trick to remember which months have 31 days (jan-jul)


When you get to the end of your hand, go back to the first knuckle, and continue reciting.

using knuckle trick to demonstrate months have 31 days (Aug-Dec)

Your knuckles (higher up than the wells in between) represent the months with 31 days.  Get it?  Higher up = higher number of days.   The wells in between represent the months with 30 days (lower down = lower number of days).

All you really have to remember is that February only has 28 days ( or 29 in a leap year).

That’s a lot easier to remember than that silly old rhyme, don’t you think? :)

Looking for more simple tips and tricks to simplify your life?  Check out:

30 Time-Saving Tricks and Tips for the Home

Follow the Hooligans on Facebook, Pinterest and Twitter!


  1. critters and crayons (@critterscrayons) says

    I love your photo! Do you know what? I use that trick all the time!!!!!

    • happyhooligans says

      I still use it a lot too! You would think we’d have memorized it by now, wouldn’t you? lol

  2. says

    Oh! I love that you did this! I do recall a looonnggg time ago that someone told me there was a trick, but I could remember what it was, let alone be able to teach it to my kids! Great post!

  3. says

    Haha this is awesome! I could never remember for the life of me. After trying this I will never forget which months have 31 days! Very cool! Thanks for sharing;)

  4. says

    hahaha – I think the “silly old rhyme” is more my thing! And wrt hands – I KNOOOOWW when did my hands become my Mom’s? And if you look at your Mom’s hands now, you get all sad cause they’re your Grandma’s hands!

  5. says

    I taught this to my Miss last week and she loves it! I also taught her the finger trick for multiplying by 9. I think shes the only 5 year old I know that can do her 9 times table! But she loves it!

  6. Lynsy Jaymes says

    So really… It’s just every other month? 30 then 31 then 30 etc.. I didn’t realise that.

  7. Lynsy Jaymes says

    Oh wait no that’s not right lol because August starts on 31 again after July having 31. Sorryyyyy

  8. Helen Murchison says

    After going back to school at the age of 50, I found myself still having a hard time remembering the days in a month. My grandson told me about this trick. He said that I taught it to him some time ago but for the life of me, I can’t remember that. lol

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>