How to show dates marked on the calendar separate from selectedDate?

[DitoXD]

I'd like to mark dates before and after DateTime.now() but I'm not sure how to go about that. I'd like to mark multiple dates across the calendar and be able to set props for those dates differently before and after DateTime.now(). Any assistance or recommendations for it?

[CyMathew]

You could use itemBuilder to specify styling on certain dates. itemBuilder provides fullDate so you can do something like

itemBuilder: (context, dayNumber, dayName, monthName, fullDate, isSelected) {
  if((DateUtils.isSameDay(fullDate, YourMarkedDate)) { 
    return customMarkedDateWidget;
  }
  return regularDayWidget;
}