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C++ ctime localtime() Function

❮ ctime Functions

Example

Create a tm structure for the current time in the computer's local time zone:

time_t now;
struct tm * date;

time(&now);
date = localtime(&now);

cout << "Local time: " << asctime(date);
Try it Yourself »

Definition and Usage

The localtime() function returns a tm structure with date information for a timestamp in the computer's local timezone.

The localtime() function is defined in the <ctime> header file.

The returned tm structure has the following members:

  • tm_sec - The seconds within a minute
  • tm_min - The minutes within an hour
  • tm_hour - The hour within a day (from 0 to 23)
  • tm_mday - The day of the month
  • tm_mon - The month (from 0 to 11 starting with January)
  • tm_year - The number of years since 1900
  • tm_wday - The weekday (from 0 to 6 starting with Sunday)
  • tm_yday - The day of the year (from 0 to 365 with 0 being January 1)
  • tm_isdst - Positive when daylight saving time is in effect, zero when not in effect and negative when unknown

Tip: Use the time() or mktime() functions to create a timestamp.

Syntax

localtime(time_t * timestamp);

The time_t data type represents a number.

Parameter Values

Parameter Description
timestamp Required. A pointer to a timestamp.

Technical Details

Returns: A tm structure representing the date and time of the timestamp in the computer's local time zone.

❮ ctime Functions