jordancalder

This plugin adds a countdown timer to your webpage with the use of a shortcode.
In Settings > WP Countdown Timer, set the datetime you want to count down towards and save.
Use the shortcode [countdown] on any page to display the countdown timer.

WordPress Countdown Timer

Wordpress plugin to add a countdown timer to your website. Display a timer and countdown to any day, time, or event.

BlueLevel

The version 2.7.3 is Here! 
* Numerous Bug Fixes. 
* A better experience altogether.
A set up tutorial video for you: 
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/YK6bblxpCWo?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
Bored of the same old dusty countdown clocks with next to no animations and limited customization? Then you are at the right place. CountDown Flipclock is the #1 countdown timer plugin to use in your WordPress website!
Benefits that you will get from this plugin are:- 
1. Built-in TinyMCE button provides full scope to enter the shortcode in any rich editor. 
2. Built with CSS3 for minimum loading time and better performance 
3. Built with a responsive layout for coverage of all devices 
4. Ability To add an unlimited number of FlipClocks 
5. Maximum customizability

CountDown FlipClock

Welcome to the page of the next-gen 3D countdown timer - CountDown FlipClock, created and maintained by BlueLevel Communications.

WordPress Countdown Timer vs CountDown FlipClock