How to add an event to the Islamic Calendar?

Hi, was wondering if there is any way to add an event onto the Islamic Calendar on the iPhone?

I've already got the Islamic Calendar to show from Settings and I can add an event to the Gregorian Calendar.

For example, if I wanted to record the birth date of someone and have a reminder every year for it, the reminder would come 20 March for the first year and second year it would be around 10 March (depending on the Islamic Calendar dates for the year)

Hope this makes sense and is possible to do!