Como hacer que esta cuenta regresiva de html en verdad cumpla su función.

Question

<div id="time_countdown" class="time-count-container">

                    <div class="col-sm-3">
                        <div class="time-box">
                            <div class="time-box-inner dash days_dash animated" data-animation="rollIn" data-animation-delay="300">
                                <span class="time-number">
                                    <span class="digit">0</span>
                                    <span class="digit">0</span>
                                    <span class="digit">0</span>
                                </span>
                                <span class="time-name">Dias</span>
                            </div>
                        </div>
                    </div>

                    <div class="col-sm-3">
                        <div class="time-box">
                            <div class="time-box-inner dash hours_dash animated" data-animation="rollIn" data-animation-delay="600">
                                <span class="time-number">
                                    <span class="digit">0</span>
                                    <span class="digit">0</span>   
                                </span>
                                <span class="time-name">Horas</span>
                            </div>
                        </div>
                    </div>

                    <div class="col-sm-3">
                        <div class="time-box">
                            <div class="time-box-inner dash minutes_dash animated" data-animation="rollIn" data-animation-delay="900">
                                <span class="time-number">
                                    <span class="digit">0</span>
                                    <span class="digit">0</span>
                                </span>
                                <span class="time-name">Minutos</span>
                            </div>
                        </div>
                    </div>

                    <div class="col-sm-3">
                        <div class="time-box">
                            <div class="time-box-inner dash seconds_dash animated" data-animation="rollIn" data-animation-delay="1200">
                                <span class="time-number">
                                    <span class="digit">0</span>
                                    <span class="digit">0</span>
                                </span>
                                <span class="time-name">Segundos</span>
                            </div>
                        </div>
                    </div>
                    
                   
                </div><!-- /.time-count-container -->

Answer 1

Puedes probar con esto:

https://www.taringa.net/post/hazlo-tu-mismo/16226686/Hacer-cuenta-regresiva-con-jQuery.html