void Add(const int seconds=0, const int minutes=0, const int hours=0, const int days=0, const int months=0, const int years=0);\r
\r
void Set(const int year=1970, const int month=1, const int day=1, const int hour=0, const int minute=0, const int second=0);\r
void Add(const int seconds=0, const int minutes=0, const int hours=0, const int days=0, const int months=0, const int years=0);\r
\r
void Set(const int year=1970, const int month=1, const int day=1, const int hour=0, const int minute=0, const int second=0);\r