/* We have to know, whether we have to insert St. Tib's Day, so whether it's a leap
year in gregorian calendar */
int is_leap_year = !(current_tm->tm_year % 4) &&
(!(current_tm->tm_year % 400) || current_tm->tm_year % 100);
/* We have to know, whether we have to insert St. Tib's Day, so whether it's a leap
year in gregorian calendar */
int is_leap_year = !(current_tm->tm_year % 4) &&
(!(current_tm->tm_year % 400) || current_tm->tm_year % 100);