jQuery UI Datepicker

Displays a calendar from an input or inline for selecting dates.

pickadate.js

The mobile-friendly, responsive, and lightweight jQuery date & time input picker.

CLNDR

CLNDR is a calendar plugin that uses HTML templates, allowing you to write custom markup and styles that have access to useful calendar data.

jQRangeSlider

A javascript slider selector that supports dates

jQuery Date and Time picker

jQuery plugin for date, time, or datetime manipulation in form

The Final Countdown

jQuery plugin to display a countdown clock on your page.

PickMeUp

Really simple, powerful and customizable datepicker

jquery-simple-datetimepicker

Date and time picker, it’s simple & clean. (jQuery plugin)

Datepair.js

A plugin for intelligently selecting date and time ranges inspired by Google Calendar.

jQuery TimeCircles

TimeCircles is a jQuery plugin that provides a nice looking way to either count down towards a certain time, or to count up from a certain time. The goal for TimeCircles is to provide a simple yet dynamic tool that makes it very easy to provide visitors an attractive countdown or timer.