Calamari gives you the possibility to synchronize Calamari calendar with any external calendar you use such as MsOutlook, Apple calendar, etc.
The first step is to turn on iCal integration. You can do this by going into Configuration -> iCal -> Turn on (as shown in the GIF below).
Next, to create the Calamari calendar that you would like to synchronize, you have to go to your User profile -> Calendar subscription
Here you can see a default Calamari Calendar - the very same as you can see in Calamari in the Calendar tab. To add a new calendar, please click the Add button.
During the creation process, you will be able to choose whose events will be visible (mine, my subordinates', my organization's) and what kinds of events users will be able to see (holidays, birthday, remote work, etc.)
When your calendar is ready, you can copy the URL address and paste it into the external calendar you are using, et voilà!
Please remember that you can freely edit or delete calendars that you have created.