Everybody knows that, in the course of mundane and ordinary years, whimsical time will occasionally bring forth from its womb other years, odd years, degenerate years, somewhere in which, like a little sixth finger upon a hand, a spurious thirteenth month sprouts up; spurious, we say; for seldom will it grow to full size. Like late begotten children, it lags behind in its development, a hunchback month, a half-wilted offshoot, and more conjectured than real.