More videos like this online at http://www.theurbanpenguin.com/ Now we have a working example to use for this lesson. We will add in the GPL license to ensure the code is shareable. You may know of or have heard of the ryme Monday's Child. We take that rhyme and decide it will be useful and fun, maybe more fun than useful; for us to know what type of child we are, or are friends spouse etc. You may already know the day that you were born on. We all know the date but many do not know the day. The C program that will build will tell us the day for a given date using Zeller's Rule.