If you have not yet exported data fro your previous account, please see Importing and Exporting G Suite/Google Account Data and follow steps for Exporting Data.
- Log in to the Google Calendar web application
- Click the arrow to the right of My calendars and choose Settings
- Click Import Calendar
Note: When importing the calendar you must choose an existing calendar in your account to import the data to. If you would not like to import the data in to an existing calendar, you may use this opportunity to create a new calendar. You may do this by clicking Create new calendar prior to importing.
- Click Choose File
- Browse to the Calendar folder within the Google Takeout data folder exported from your previous account. Select the calendar you wish to import and click Open.
- Select the existing calendar you would like to import the calendar to and select Import.