Amin Raoufi

Admin Toolbar Live Clock keeps the current site time always in view while you work.
<blockquote>
Perfect for distributed editorial teams, agencies running sites in different time-zones, or any admin who regularly checks cron jobs, comment timestamps or scheduled posts.
</blockquote>
<h3>Who benefits?</h3>
<ul>
<li>Editors coordinating global content releases </li>
<li>Support agents logging activity against server time </li>
<li>Developers verifying scheduled tasks (Cron / Action Scheduler) </li>
<li>Multisite super-admins overseeing sites across regions </li>
</ul>
<h3>Feature highlights</h3>
<ul>
<li>Live ticking – updates every second; no page reloads, no Ajax polling </li>
<li>Calendars – Gregorian, Persian (Jalali), Islamic (Hijri), Hebrew, Buddhist (Thai) and Japanese </li>
<li>Languages bundled – English (en_US), فارسی (fa_IR), العربية (ar_SA), Español (es_ES), Français (fr_FR), עברית (he_IL), हिन्दी (hi_IN), 日本語 (ja_JP), ไทย (th_TH) (+ fully translatable via PO/MO files)</li>
<li>Time formats – 12-hour or 24-hour </li>
<li>Per-user timezone – keep the site setting or pick any IANA timezone </li>
<li>Colour-picker – separate, native WP colour-picker fields for clock & date </li>
<li>Admin-only & WPCS – assets load only in wp-admin for users with manage_options; codebase follows WordPress-Coding-Standards </li>
<li>Clean uninstall – removes all options on Delete via <code>uninstall.php</code> </li>
</ul>
Find the settings page at Dashboard → Settings → Toolbar Clock.

Admin Toolbar Live Clock

Real-time clock for the admin toolbar with multi-calendar, per-user timezone and colour controls.

netdesignr

This super light weight plugin helps WordPress users hide the admin toolbar completely or partially within seconds.
The plugin comes with three options: 
1. Hide from all 
2. Hide from all except Administrators 
3. Hide from Administrators except other users
Major features in RA Toolbar include:
<ul>
<li>Show/Hide admin toolbar</li>
</ul>

Remove Admin Toolbar


Great for those sites that have users logging into the site, but they don't need the admin bar as everything is done via the menus


Great plugin if you don't want WP bar across the top

Remove Admin Toolbar helps you hide the admin toolbar completely or partially within seconds.

Admin Toolbar Live Clock vs Remove Admin Toolbar