dhruwal

This plugin is useful when you want to know what date time & timezone is it on server where wordpress is hosted if you are in other timezone. 
Output looks like:
Server Date/Time: Sat 06th Dec,2008 11:17 am 
Server Timezone: America/Phoenix, (MST -07:00)
Version Change log:
v0.5 
Supports upto WordPress 3.7.1
v0.4 
Supports upto WordPress 3.6
v0.3 
Minimize css code 
Supports upto WordPress 3.5.1
v0.2 
Added description before date time 
Added timezone information 
Changed text color from red to green
v0.1 
Initial release

WP Server Date Time

This plugin shows the server local current date time & timezone in the upper right of your admin screen on every page.

kartechify

kartikparmar

This is a light weight plugin which allows your customer to convert the time from one timezone to another timezone.
Basically, this plugin add a Timezone Conversion widget, which shows the date & time, from timezone and to timezone selection field on the front end of website.
Visitor can select date and time, from and to timezone from the dropdown and submission of it will show the converted date & time.
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/w2uMU1xFZdA?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>
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<a href="https://kartechify.com/product/sort-woocommerce-products-in-cart-and-order/" title="Sort WooCommerce Products in Cart and Order" rel="nofollow ugc">Sort WooCommerce Products in Cart and Order</a>
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Timezone Conversion Widget

A simple light weight plugin to Convert the time from one timezone to other timezone.

WP Server Date Time vs Timezone Conversion Widget