Generally, you can use the following programs to open ICS files:
- Microsoft Outlook
- Mozilla Thunderbird
- Apple Calendar
- Google Calendar
- ICS File Converter
It’s very easy to open ICS files with the Apple Calendar app. Events can also easily be imported directly into the application.
If you’re using Google Calendar, it only takes a couple of steps to import an event. Go to the “Settings” menu (click on the small gear icon next to the question mark) in your Google Calendar and select the “Import & Export” option. On the right-hand side, a new window will appear. By clicking on “Select file from your computer”, you can search your computer for the ICS file, select it, open it and automatically enter the event by choosing “Import”.