Antonio D.

Daniil Zhitnitskii

This plugin provides network administrators ability to set same time zone over all blogs in multisite installation in one click, and also it restricts changes of timezone from local blogs settings.
*Based on: https://premium.wpmudev.org/forums/topic/set-default-timezone-for-new-blogs-in-the-network
Only works with multisite installation!
Gutenberg: compatible!
<h3>Disclaimers</h3>
The Simple default timezone plugin is supplied “as is” and all use is at your own risk.

Simple default timezone

As Super Administrator, you can set the (default) timezone for all blogs.

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.

Simple default timezone vs Admin Toolbar Live Clock