tm

Structure holding a calendar date and time broken down into its components.

Member objects

Notes

The Standard mandates only the presence of the aforementioned members in either order. The implementations usually add more data-members to this structure.

1. ↑ Range allows for a positive leap second. Two leap seconds in the same minute are not allowed (the C89 range 0..61 was a defect)

Example

#include <stdio.h>
#include <time.h>
 
int main(void)
{
    struct tm start = {.tm_year = 2022 - 1900, .tm_mday = 1};
    mktime(&start);
    printf("%s", asctime(&start)); // note implicit trailing '\n'
}

Sat Jan  1 00:00:00 2022

References

See also