As the map owner, you will find the “Import calendar (ICS)” option in the calendar menu.

Here you can upload an ICS file. All events will then be imported automatically.

With the import you can choose a color for all imported events.

 

“ICS” stands for “Internet Calendaring and Scheduling Core Object Specification (iCalendar)”. It is a file format for sharing calendar information. Almost every external application allows you to export a calendar as an ICS file.