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.

Midhun Devasia

<a href="http://github.com/midhundevasia/wp-display-timezone/" rel="nofollow ugc">Display Timezone</a> is simple plug-in to display current time with timezone in the upper right of your admin screen on every page. It takes the values from the option Timezone, Date Format, Time Format and starts the clock. There is no configuration page.
<h4>When you going to use</h4>
If your wordpress site is hosted at London and you are from China, both time are diffrent. You get confused while schedule the post and other events related to time. If you look at your machine its shows your time, not the server time. Here you can use the plugin. ie The Plugin Shows your server time, not the machine time or browser time.

Display Time(zone)

Display Timezone is simple plug-in to display current time with timezone in the upper right of your admin screen on every page.

WP Server Date Time vs Display Time(zone)