public System.int SpecificDayOfMonth {get; set;}
When the YearlyPattern Property is SpecificDayOfYear Field, this is the number of the day of the month the schedule will be executed. For example, 22 for the schedule to occur on the 22nd day of the month.
If a month does not have a day with that number (e.g. February does not have 31 days) then the system will "round" to the last day of the month.
public System.int SpecificDayOfMonth {get; set;}