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# tm

From cppreference.com
< c‎ | chrono

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

### [edit] Member objects

int tm_sec | seconds after the minute – [0, 61](until C99) / [0, 60] (since C99)[note 1] (public member object)
int tm_min | minutes after the hour – [0, 59] (public member object)
int tm_hour | hours since midnight – [0, 23] (public member object)
int tm_mday | day of the month – [1, 31] (public member object)
int tm_mon | months since January – [0, 11] (public member object)
int tm_year | years since 1900 (public member object)
int tm_wday | days since Sunday – [0, 6] (public member object)
int tm_yday | days since January 1 – [0, 365] (public member object)
int tm_isdst | Daylight Saving Time flag. The value is positive if DST is in effect, zero if not and negative if no information is available (public member object)

###### [edit] Notes

1. ↑ Range allows for a positive leap second. Two leap seconds in the same minute are not allowed (the C90 range 0..61 was a defect)

### [edit] Example

Show the start of calendar time.

Run this code

    #include <stdio.h>
    #include <time.h>

    int main(void)
    {
        printf("%s\n", asctime(&(struct tm){.tm_mday=1}));
    }

Possible output:

    Sun Jan  1 00:00:00 1900

### [edit] See also

localtime | converts time since epoch to calendar time expressed as local time (function) [edit]
gmtime | converts time since epoch to calendar time expressed as Coordinated Universal Time (UTC) (function) [edit]
C++ documentation for tm

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