This is an amazing deal and the header pins being on the "wrong side" is not such a big deal. This is the RTC bargain of the year! It was easy to set up and I now have the most accurate self-contained Arduino-based timer imaginable. The documentation on the wiki is excellent and made it easy to get things working in just a few minutes.

One suggestion/question, would you mind adding another piece of example code showing how to set the time and date on the DS3231?