Provided by: libsdl3-doc_3.2.20+ds-2_all 

NAME
SDL_GetDayOfYear - Get the day of year for a calendar date.
SYNOPSIS
#include <SDL3/SDL_time.h>
int SDL_GetDayOfYear(int year, int month, int day);
FUNCTION PARAMETERS
year the year component of the date.
month the month component of the date.
day the day component of the date.
RETURN VALUE
Returns the day of year [0-365] if the date is valid or -1 on failure; call SDL_GetError() for more
information.
AVAILABILITY
This function is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.20 SDL_GetDayOfYear(3)