This can be done very easy in wordpress just need to add those lines in function.php of the theme

function my_wp_default_styles($styles)
{
	//use release date for version
	$styles->default_version = "20160714";
}
add_action("wp_default_styles", "my_wp_default_styles");

Материалът wordpress forse css styles version е публикуван за пръв път на rosen4o.net.