#compdef cal ncal

local args

case $service in
  cal)
    args=(
      '-3[three in a row]'
      '-m[Monday as first day of the week]'
    )
  ;;
  ncal)
    args=(
      '-J[display Julian calendar]'
      '-e[display date of western Easter]'
      '-o[display date of orthodox Easter]'
      '-p[assume as by ncal]'
      '-s[country code]'
      '-w[print number of the week below each column]'
    )
  ;;
esac

_arguments "${args[@]}" \
  '-j[display Julian days]' \
  '-y[display a calendar for the current year]' \
  '::month' \
  ':year'