Comment 2 for bug 1736785

$ ncal -w -b -3
   November 2017 December 2017 January 2018
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
          1 2 3 4 1 2 1 2 3 4 5 6
 5 6 7 8 9 10 11 3 4 5 6 7 8 9 7 8 9 10 11 12 13
12 13 14 15 16 17 18 10 11 12 13 14 15 16 14 15 16 17 18 19 20
19 20 21 22 23 24 25 17 18 19 20 21 22 23 21 22 23 24 25 26 27
26 27 28 29 30 24 25 26 27 28 29 30 28 29 30 31
                      31

Working ncal in classic mode.

./ncal.18.04 -w -b -3
      November 2017 December 2017 January 2018
 w| Su Mo Tu We Th Fr Sa w| Su Mo Tu We Th Fr Sa w| Su Mo Tu We Th Fr Sa
44| 1 2 3 4 48| 1 2 53| 1 2 3 4 5 6
45| 5 6 7 8 9 10 11 49| 3 4 5 6 7 8 9 1| 7 8 9 10 11 12 13
46| 12 13 14 15 16 17 18 50| 10 11 12 13 14 15 16 2| 14 15 16 17 18 19 20
47| 19 20 21 22 23 24 25 51| 17 18 19 20 21 22 23 3| 21 22 23 24 25 26 27
48| 26 27 28 29 30 52| 24 25 26 27 28 29 30 4| 28 29 30 31
                           53| 31