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DYSIZE(3)                  Linux Programmer's Manual                 DYSIZE(3)

       dysize - get number of days for a given year

       #include <time.h>

       int dysize(int year);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       dysize(): _BSD_SOURCE || _SVID_SOURCE

       The  function  returns  365  for a normal year and 366 for a leap year.
       The calculation for leap year is based on:

       (year) %4 == 0 && ((year) %100 != 0 || (year) %400 == 0)

       The formula is defined  in  the  macro  __isleap(year)  also  found  in

   Multithreading (see pthreads(7))
       The dysize() function is thread-safe.

       This function occurs in SunOS 4.x.

       This is a compatibility function only.  Don't use it in new programs.


       This  page  is  part of release 3.74 of the Linux man-pages project.  A
       description of the project, information about reporting bugs,  and  the
       latest     version     of     this    page,    can    be    found    at

GNU                               2013-09-25                         DYSIZE(3)

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