The snark is extremely dry, so it is entirely reasonable to have misunderstood it. But the effect of adding an unconditional day to November would be to increase the year to 366 days (and 367 on leap years), which even the ancients knew was totally wrong. And the effect of adding a day to November and take it from e.g. December is just to affect how we do human accounting; there&#x27;s no astronomical concept of December 1 that needs to line up with anything.