property OnDateSelected: TNotifyEvent read GetOnDateSelected write SetOnDateSelected;
Occurs when the day is modified.
OnDateSelected will not occur when the month or year is modified.
For example, OnDateSelected will not occur if the date is changed from October 17 to November 17. Although, for some special cases, increasing the month or year will result in changing the day (for example, from October 31 increasing the month by one will lead to November 30), OnDateSelected will not be triggered.