Arduino-based master clock for schools

Step 6 The DaylightSavings library

This is an optional library that works together with the modified DateTime library.

If your daylight savings changes are not identical to the US post 2007 regime, then it is only necessary to modify a single function that is located in its own file. In fact, as more file for different locales are provided, they can all be distributed and chosen by simply using the one correct file. This limits the amount of code generated for this library.