OotD - Outlook on the Desktop will place the Microsoft Outlook Calendaring system right on your desktop.

You will always have your events, etc., in plain sight so you can always see what's upcoming and stay organized. Of course, the benefits don't stop there because it's the actual Microsoft Outlook calendar; you get all its functionality, such as direct editing, drag n' drop of files, etc.

OotD - Outlook on the Desktop places a fully functional Microsoft Outlook Calendar on your Desktop, which is pinned to your desktop so that no windows can get stuck behind it. The Calendar's position, size, and opacity are all adjustable via its intuitive GUI. There is also a systray icon that includes the day of the month, allowing you to configure the app and perform other actions. It can also switch between Calendar, inbox, contacts, tasks, note views, as well as support for multi-monitor setups.

Just in case it isn't obvious, you do need to have Outlook installed for OotD - Outlook on the Desktop to properly function.

Similar:

How to Uninstall Mail and Calendar Apps in Windows 10

Version History for OotD - Outlook on the Desktop:
http://www.outlookonthedesktop.com/changelog