Calendar 366 Plus 2.8.6 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program lies within Productivity Tools, more precisely Timekeeping. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This Mac app is a product of n.spektor.
From the developer:
Calendar 366 Plus is a complete menu bar calendar for events and reminders. You just need to click on the menu bar item and you will get an overview of all your events and reminders. The program allows you to view, add, edit, and delete your notes easily.
You may want to check out more software for Mac, such as Calendar 366 II, Photo Calendar Print or Desktop Calendar Plus, which might be related to Calendar 366 Plus.