SDT Repeat Schedule (Nth day feature)

The SDT feature is critical for a monitoring tool to be able to schedule blackout periods ahead of time. A lot of clients schedule their maintenance windows on a certain weekend of the month and your tool only allows you to set up repeat schedules daily at a certain time, weekly on a certain day, or monthly on a certain day of the month. This covers a lot of bases, but it's not how a good number of clients schedule regular downtime. For clients who schedule their downtime on the "4th Saturday of every month" you have to manually enter these dates as there is not way to automate it on a repeat basis.

I suggest adding a "N^th weekday of the month" option so one can schedule based on the "1^st Sunday" or "Last Saturday" or "4^th Wednesday". This is common enough to be very useful.

Thanks!