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.

PluginJoy

Tired of timezone confusion killing conversions? Global Time Ghost is the lightweight WordPress timezone converter that makes your site visitor-smart. Convert UTC times to local time seamlessly—ideal for e-commerce, events, and remote teams.
Free Features: 
* <code>[gtg_time]</code> shortcode: Display local times in posts, pages, or widgets (with upgrade badge). 
* WooCommerce integration: Add local-time badges to product prices. 
* Basic settings page: Enable/disable features easily. 
* Browser-based detection: Uses JS and cookies for accurate timezone conversion (falls back to UTC).
Pro Features (upgrade for $39 lifetime): 
* Full auto-adjustments for prices, events, and email reminders. 
* Deep hooks for The Events Calendar, WooCommerce, and more.
No bloat—just PHP smarts for better global UX. Perfect for WooCommerce stores, event sites, and international blogs needing a reliable local time plugin.

Global Time Ghost

Automatically adjust times, prices, and events to visitor's local timezone. WooCommerce-compatible shortcode and badges for global WordPress sites.

WP Server Date Time vs Global Time Ghost