Yes, what you are describing is a 'wrapper script' because you are wrapping script around the command(s) (in this case the cal command) to perform differently than without the wrapper. So, you are on the right track. Remember to have statements or switches "Jan" and "jan" and "January" etc. based on your project needs. Also, when you write a wrapper, if others will be using it, you might consider writing a quick man page and/or a command line help file.