typedef struct SCA{
    int jd;    // Julianday
    int day;   // as created
    int month; // wie erstellt
    int year;  // wie erstellt
    int leap;  // 1 || 0
    char age;  // G || J
    int wd;    // DoW Mo:1,, So:7
    int hour;
    int minute;
    int second;
} SCA;


SCA *scaliger_day(int julianday);
SCA *scaliger_date(char age, int day, int month, int year);
SCA *scaliger_time(int secsince);