This article provides links to Microsoft articles to assist in importing calendar events to your Microsoft 365 calendar.
To import calendars from web sites or calendar programs that support the .ics or .vcs file formats, follow these instructions on Microsoft's support page. If you are using the Outlook application: https://support.microsoft.com/en-us/office/import-calendars-into-outlook-8e8364e1-400e-4c0f-a573-fe76b5a2d379 If you're using Outlook.com (on the web): https://support.microsoft.com/en-us/office/import-or-subscribe-to-a-calendar-in-outlook-com-cff1429c-5af6-41ec-a5b4-74f2c278e98c