Displaying week's number in certain format using ncal or cal

Don't you just love it when two commands each do one thing you want but neither do both? This is what cal does. Nice formatting. Lacks week numbers though: $ cal January 2012 Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 This is what ncal does. Weird formatting, but with week numbers: $ ncal -w January 2012 Su 1 8 15 22 29 Mo 2 9 16 23 30 Tu 3 10 17 24 31 We 4 11 18 25 Th 5 12 19 26 Fr 6 13 20 27 Sa 7 14 21 28 1 2 3 4 5 The kind of output I want, actually a crossbreed between cal and ncal -w: $ cal --magik-calendar-week-option January 2012 Su Mo Tu We Th Fr Sa 1 1 2 3 4 5 6 7 2 8 9 10 11 12 13 14 3 15 16 17 18 19 20 21 4 22 23 24 25 26 27 28 5 29 30 31