Imported Public Holidays are not showing the correct date
In Lotus Notes you have a feature to import Public Holidays into your Calendar. When you migrate these imported Public Holidays, they display correctly in Lotus Notes but when you migrate the mail file, the dates are showing as incorrect.
This has been identified as a product enhancement TF00451751. Currently the only workaround is to remove the entries and re-add them from a different source in Outlook.