Collapse the table of content
Expand the table of content


Retrieves the daylight saving time offset in seconds.

error_t _get_dstbias( 
    int* seconds


The offset in seconds of daylight saving time.

Zero if successful or an errno value if an error occurs.

The _get_dstbias function retrieves the number of seconds in daylight saving time as an integer. If daylight saving time is in effect, the default offset is 3600 seconds, which is the number of seconds in one hour (though a few regions do observe a two-hour offset).

If seconds is NULL, the invalid parameter handler is invoked as described in Parameter Validation. If execution is allowed to continue, this function sets errno to EINVAL and returns EINVAL.

Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.


Required header



For more information, see Compatibility.

Community Additions

© 2015 Microsoft