Follow these steps to sync your SharePoint calendar with your Outlook calendar:

1. Access your SharePoint calendar, which should have an almost identical interface as Outlook.
2. Open your Outlook calendar, located either on the left or bottom navigation pane.
3. Click on the Add Calendar button, located in the top ribbon.
4. Select the From Internet option.
5. Copy and paste in the SharePoint calendar URL and click OK.
6. When prompted to name your calendar, choose a descriptive name and Click OK.
7. Click Import.
8. Your calendars will now sync. You can click the Gear icon to further customize the display.