Convert numerical date to day of week in c

The following C project contains the C source code and C examples used for convert numerical date to day of week. convert a numerical date (mm dd yyyy) into "day of a week" (e.g., 5 24 1997 -> Saturday). Stores the record of previous conversion. This is my first try. Comments will be appreciated.

The source code and files included in this project are listed in the project files section, please make sure whether the listed source code meet your needs there.

Project Files: 

File NameSize
DateConversion.c 12151