It's requested to have something like this in the thank you email for recurring donors:

Once a month on the %DAYOFMONTH%, a donation of %AMOUNT% will be debited by the Wikimedia Foundation until you notify us to stop.

However I don't see a way to add the %DAYOFMONTH% as a variable. Can this be added? We might also need some help localizing it to be an ordinal number.

We'll go ahead without including the day of the month for now.