C++

Reference

<ctime> (time.h)

type
<ctime> <cwchar>

struct tm

Time structure
Structure containing a calendar date and time broken down into its components.

The structure contains nine members of type int (in any order), which are:

MemberTypeMeaningRange
tm_secintseconds after the minute0-61*
tm_minintminutes after the hour0-59
tm_hourinthours since midnight0-23
tm_mdayintday of the month1-31
tm_monintmonths since January0-11
tm_yearintyears since 1900
tm_wdayintdays since Sunday0-6
tm_ydayintdays since January 10-365
tm_isdstintDaylight Saving Time flag
MemberTypeMeaningRange
tm_secintseconds after the minute0-60*
tm_minintminutes after the hour0-59
tm_hourinthours since midnight0-23
tm_mdayintday of the month1-31
tm_monintmonths since January0-11
tm_yearintyears since 1900
tm_wdayintdays since Sunday0-6
tm_ydayintdays since January 10-365
tm_isdstintDaylight Saving Time flag
The Daylight Saving Time flag (tm_isdst) is greater than zero if Daylight Saving Time is in effect, zero if Daylight Saving Time is not in effect, and less than zero if the information is not available.

* tm_sec is generally 0-59. The extra range is to accommodate for leap seconds in certain systems.

See also

mktime
Convert tm structure to time_t (function)
localtime
Convert time_t to tm as local time (function)
gmtime
Convert time_t to tm as UTC time (function)