Gets or sets the ordinal number of a day within a defined month.
A positive integer value that specifies the day number within a month.
If the recurrence pattern is defined on a monthly or yearly time basis (the RecurrenceInfo.Type property is set to the RecurrenceType.Monthly or RecurrenceType.Yearly value), the DayNumber property specifies the number of the day within a month. This is used to calculate the date on which the corresponding appointment will reoccur. The effective values for this property are 1 to 31 inclusive which correspond to the days within a month.
Note: If a value set for the DayNumber property via code is more than the number of days in the specified month, 31 will be assigned instead. At the same time, assigning a value less than 1 to the DayNumber property will cause a value of 1 to be assigned.