Calendar event repeating every month but on a certain day Is it possible to create a calendar event repeating every month but on a certain day?

For example our window cleaner started on a Friday and comes every month but on the Friday. Calendar obviously works it out to be a Sunday but it would have been the Friday 2 days prior to that. 

Is it possible to do such a thing in Calendar?
Select the event. Go into repeat. Select Custom. Change your frequency to monthly and "on the" to whichever day you want.