This is 99% invisible. I'm Roman Mars.

30 days hath September, April, June, and November.

February has 28 alone. All the rest have 31. Except in Leapier, that's the time when February's days are 29.

That doesn't even rhyme.

Oh, the poem I grew up with was slightly different.

Producer Avery Truffelman.

30 days, half September, April, June, and November.

All the rest have 31, except for February, which has 28 days clear and 29 in each leap year.

Okay I think that rhymes actually worse.

Both poems say the same thing, which is that months don't make any logical sense.

A month is hardly a unit of measurement.

It can be anywhere from 28 to 31 days.

Sometimes it's four weeks, sometimes five, sometimes six.

You have to buy a new calendar with new dates every single year.

It's a strange design.

Well, the year that we now have and basically consider almost a writ of God you know somehow it's just

indivisible there it is actually has had an amazing history that is David

Ewing Duncan and I am the author of calendar.

Humanity's epic struggle to determine a true and accurate year.

The calendar that the world really uses right now is mostly a sort of joining of the Roman

calendar and Egyptian calendar. It's basically when Caesar and Cleopatra were

kind of hanging out and doing their thing. Which is to say, when Roman Caesar and Egyptian Cleopatra

...