Browse - Programming Tips - How can I convert a 24-hour time time to a 12-hour time?
Q. How can I convert a 24-hour time time to a 12-hour time?
A. Its only tricky around midnight.
// Convert a 24-hour time to a 12-hour time
// (eg 13 becomes 1pm)
int Hour24ToHour12(const int hour24)
int hour = hour24;
if (hour == 0) hour = 12; // at 30 minutes into the day we want 12:30 not 00:30
if (hour > 12) hour -= 12;
Or if you want "am" / "pm" also
void Hour24ToHour12Str(const int hour24, LPSTR buf, const size_t size)
int hour12 = Hour24ToHour12(hour24);
char part = (hour24 >= 12) ? 'p' : 'a';
_snprintf(buf, size, "%d%cm", hour12, part);