I am working on converting a Notes application to a SharePoint
application and having some difficulties with converting the calendar
functionality of Notes to SharePoint Calender list.

In Notes, there is Custom under repeating events, which you can pick
random dates to repeat the event. It also provides every 2 year,
every 3 year, every 4 year, .... every 10 year recurring options,
which SharePoint calendar doesn't have.

Is there anyone knows how to implement the similar functionality in
SharePoint? I have been researching and testing past a couple of days,
but haven't found any good solution yet.