fetch data based on month and year in laravel

$post = Mjblog::whereYear('created_at', '=', $year)
              ->whereMonth('created_at', '=', $month)
              ->get();

$date = Carbon::createFromFormat('d/m/Y', $request->salary_date);

$empsalaries = EmpSalary:: whereMonth('salary_date', $date->month)
    ->whereYear('salary_date', $date->year)
    ->get()