For those who want to never learn sed addressing modes, here's a slight cheat using only simpler shell logic. The cheat is to realize you can concatenate multip

For those who want to never learn sed addressing modes, here's a slight cheat using only simpler shell logic. The cheat is to realize you can concatenate multiple calls to `cal -1` instead of reshaping the 3x4 grid into 12x1, so just focus on the per-month splicing task... #!/bin/sh g() { read m; read n [ $1 -eq 1 ] \ && printf '%20.20s %s\n' "$n" "$m" \ || printf ' %s %s\n' "$n" "$m" sed -e 's/ *$/ /' } f() { cal -1 $@ | grep '[0-9]' | g $@ | head -c -1 } y=${1:-`date +%Y`} for m in {1..12}; do f $m $y; done printf "\n"