There is also a `-b` flag to get it back in to the shape you'd expect from cal. I find the week column easier to read in that form:
w| Mo Tu We Th Fr Sa Su
31| 1 2 3
32| 4 5 6 7 8 9 10
Perhaps worth noting that ncal's -w is ISO-8601 compliant¹, which may surprise some people around new year as week numbers can reset in December or January.
[Said as someone who aliases cal to "ncal -wb" mostly just to get the correct first day of the week for their locale.]
