Introduction: Use Your Knuckles to See If a Month Has 31 Days!

I could never remember that poem about how many days in a month, so I came up with the "Knuckle Method." Check it out!


F. ToddP1 (author)2015-10-13

My mom taught me that trick when I was little.

rkbreland (author)2011-06-06

Learned this trick over 30 years ago and still use it to this day.

NatureBoom21 (author)2009-09-22

i learned this in first grade........

frelllingbored (author)2009-09-20


Patented (author)2009-08-23

My teacher learn me this when I was in 4 grade :P but nice vid man!

code_e (author)2009-08-22

Neato, man. 5 stars.

Flumpkins (author)2009-08-21

oh, I get it. That is awesome!

jakerobinson (author)2009-08-21

great little tip... and something else... never noticed that there are only two times that two mos with 31 are adjacent... cool

Mike__ (author)2009-08-20

Nice! My father showed me this almost 20 years ago. I still use it to this day.

Tape-structable (author)2009-08-20

WOW. Helpful! 5/5! Thanks.

About This Instructable




Bio: I'm an environmentally conscious experimenter who loves to bring people together, build things, and when possible...blow things up! See us on YouTube too ...
More by Marsh:My Injection Molding Project!Make a Propane Forge for $50!Round Tube Center Finder!
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