With Outlook 2013 open click on the File tab.

Select Open & Export and click on Import/Export to open the Import/Export wizard.

Then From the Import/Export wizard select Import from another program or file.

Select Outlook Data File (.pst)

Browse to the folder where the .pst file you exported earlier is located and select Repalce duplicates with items imported to avoid having duplicate entries.

Select Include subfolders and Import items into the current folder and click Finish.

Check your calendar and verify that the all imported appointments are visible.
