Provided by: libsdl3-doc_3.2.10+ds-1_all 

NAME
SDL_GetDaysInMonth - Get the number of days in a month for a given year.
HEADER FILE
Defined in SDL3/SDL_time.h
SYNOPSIS
#include "SDL3/SDL.h" int SDL_GetDaysInMonth(int year, int month);
FUNCTION PARAMETERS
year the year. month the month [1-12].
RETURN VALUE
Returns the number of days in the requested month or -1 on failure; call SDL_GetError () for more information.
AVAILABILITY
This function is available since SDL 3.2.0. Simple Directmedia Layer SDL 3.2.10 SDL_GetDaysInMonth(3)