Ivan Popov

This plugin will give you a simple shortcode allowing you to display the visitor current date and time. Works both with standard time and arabic time.
You can customize it with css using classes arabictime, bgtime and standardtime.
Shortocodes that can be used are:
[arabic-current-date] 
[current-date] 
[bg-current-date]
or call it within your theme within
echo do_shortcode(‘[current-date]’);

User Local Date and Time

This plugin will give you a simple shortcode allowing you to display the visitor current date and time. Works both with standard time and Arabic time.

WP Copy Defender

<h3>SHOW CURRENT TIME AND DATE</h3>
Have you ever wanted to show the date of today in your website and keep it automatically updated for Search Engines and visitors?
This plugin gives you maximum flexibility to choose the format and timezone for current timestamp.
<h4>SEO-friendly and lightweight code</h4>
This plugin contains lightweight code to be very fast to load, SEO-friendly, and it is developed to have full compatibility with WordPress 3.1 (2011) up to WordPress 5+ (2019), from PHP 5.6 up to PHP 7.3.
<h4>FEATURES:</h4>
<ul>
<li>Select your timezone from a list of dozens of options.</li>
<li>Choose your favourite format to show the date</li>
<li>Lightweight code to quickly load the page and keep a good pagespeed score</li>
<li>No cookies are set by this plugin to visitors</li>
<li>Compatible with all resolutions: desktop, tablet, and smartphones</li>
</ul>
<h4>HOW TO USE:</h4>
In order to display current timestamp in your content using this plugin, you have 2 easy options to have maximum flexibility.
OPTION 1: Use a shortcode
In order to display the output in your specific posts or pages use this code:
<pre><code>[Current_Date title="custom-title"]
</code></pre>
or
<pre><code>[Current_Date]
</code></pre>
In order to display the output in your WordPress template use this code: 
 <code><?php echo do_shortcode( '[Current_Date title="custom-title"]' ); ?></code>
OPTION 2: Use a widget 
Go to Appearance > Widgets and add Current_Date widget where you want to show it.

Current Date for Posts, Pages, or Template

Display current time and date via widget and shortcode on posts, pages, or template with this SEO-friendly plugin.

User Local Date and Time vs Current Date for Posts, Pages, or Template