[AnthonyFink]

что делаю не так ?

newNote();
function saveToDo(){
	// take date of new note
	var date = new Date()
	// take note
	var getId = date.getTime();
	var getNote = document.getElementById('todobox').value;
	var futureDate = document.getElementById('future_date').value;
	var errorMessage = document.getElementById('error_message');
	// validation for empty textarea

	if (getNote === "") {
		errorMessage.innerText = 'You must write something in description';
		errorMessage.classList.remove("error_text");
        return false;
        }else if(futureDate === ""){
        errorMessage.innerText = 'You must write date';
        errorMessage.classList.remove("error_text");
        return false;
        }