n on time selection </span> <br>
                                        &nbsp; ready: null, <span class="text-muted">// Callback function when time picker is initialized </span> <br>
                                        &nbsp; shown: null, <span class="text-muted">// Callback function when time picker is shown </span> <br>
                                        &nbsp; hidden: null <span class="text-muted">// Callback function when time picker is hidden </span> <br>
                                     