Merge branch 'tc-utc-clock-tool' into 'master'

Add Status Clock tool for UTC clock in macOS menu bar

See merge request !12365

source/handbook/tools-and-tips/index.html.md

@@ -439,6 +439,12 @@ Link your GitLab email address to an easily recognizable photo of yourself on [G
 
 [Clocker (Free / macOS Only)](https://abhishekbanthia.com/clocker/) adds a clean and distraction free world clock to your menu bar so you can check on your fellow teammates across different timezones.
 
+## Status Clock (UTC)
+
+[Status Clock](https://itunes.apple.com/us/app/status-clock/id552792489?)
+is a free, easy tool to place a second clock into the macOS Menu Bar, e.g. for showing the UTC time.
+Perfect for anyone doing sysadmin work or tasks that require referencing UTC (or any secondary timezone).
+
 ## Bear
 
 [Bear (Free)](https://www.bear-writer.com/) is a clean writing tool for notes and long-form writing. [Ulysses $5/month](https://ulyssesapp.com/) is also a great choice.