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

PickMeUp

Really simple, powerful and customizable datepicker

The Final Countdown

jQuery plugin to display a countdown clock on your page.

jquery-simple-datetimepicker

Date and time picker, it’s simple & clean. (jquery.simple-dtpicker.js)

jQuery Continuous Calendar

Date picker and range selector with scrollable months instead of paged

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.