Import ICS Calendar Files Into Google Calendar
Avoid schedule confusion by importing your information from all your calendars to one application using an ICS file. After you export your calendar entries as an ICS file with a .ics extension, you can import it into your preferred calendar. There, you can merge the entries with your existing calendar or have the events appear in a new calendar within the application you use.
Import ICS Calendar Files in Apple Calendar
Like Google Calendar, Apple Calendar also makes it easy to import ICS files. All your calendar entries are now consolidated in the Apple Calendar application.
About the ICS File Format
The ICS file format is a universal calendar format used by calendar and email programs, including Outlook for Microsoft 365, Google Calendar, Yahoo Calendar, and Apple Calendar. ICS files are plain text files that contain information such as the title, time and attendees of meetings.