Date Sorting w/Nulls

I have a grid with a date column (dhxCalendarA type) with the ColSorting set to date. There are some rows where no date will be entered (cell is null or empty). But when sorting asc, I would like the null dates to appear at the bottom of the grid instead of the top. For example, the rows will dates are priorities with due dates and need to show up first. The rows without dates are not as important. The workaround is to enter a fictitious date way in the future for the null dates, but I am hoping the sorting I want can happen without having to enter a fake date.

Thank you.

You may try to use your own custom sorting type.
Here you can find a tutorial about it’s creating:
docs.dhtmlx.com/grid__sorting.ht … ngfunction