RichWidgets\Input_Calendar has SpecialDays property.
But this property has some problems as follows:
- Can't change the special days style.
- Can't specify the year.
Therefore, I suggest adding Holidays property like SpecialDays to RichWidgets\Input_Calendar.
Using this property, we can specify dates(including year) and get specified dates displayed as Holiday(e.g. forecolor=red).
It's very useful to avoid miss input to date field which allows only business day.