There was a download of Moon Clock 1.0 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The Moon Clock installer is commonly called Moon Clock.exe or MoonClock.exe etc. The most popular version among Moon Clock users is 1.0. This free program is an intellectual property of Helmers. We recommend checking the downloaded files with any free antivirus. The program lies within Office Tools, more precisely Timekeeping.
From the developer:
It glows, just like a real moon!
A fancy moon on your desktop.
You may want to check out more software, such as Last Moon, Amazing Clock or Rubik's Clock, which might be related to Moon Clock.
Reference
Timekeeping