It is easy to import ICS files into your Google Calendar. These ICS files or iCalendar files are in a universal calendar file format. Many popular calendar applications use this format. This includes Thunderbird, Google Calendar, Apple Calendar, and Microsoft Outlook.
We will show you how to import these files in simple, step-by-step instructions.
Let us begin.
Step #1: Open Google Calendar
Login to Google using your credentials.
Open your Google calendar.

Step #2: Open the Import Dialog
In the top right corner, click on the Settings icon in the shape of a gear.

This will open a drop-down menu.
Click on the Settings option.

This will open the Settings menu.
Click the third item from top — Import & export.

This will open a drop-down menu.
Click on the Import tab in the left pane.
An Import and Export dialog box will open in the right pane.
Under Import, click on Select file from your computer.

Step #3: Import the ICS File
The File Manager will open.
Navigate to the location of your ICS file.
Click to select the ICS file.
Click on the Open button at the bottom.

The ICS file will now appear in the dialog box in the Import section.
Click on the Import button to import the file.

A notification will appear informing you of the successful import of events.
Click on OK to close the notification.

Click on the left-arrow next to Settings to exit the Settings menu.

Your Google calendar will now show the new extra events you have imported. from the ICS file.

Conclusion
We have shown you how to import an ICS file into your Google Calendar. This is an easy way to merge external events into your calendar.