[DerekM]

The min width in v3 barely fit 1 character at default size and had UI issues. Date columns have a wider min width largely due to there being a calendar widget now that appears in the cell and date formats are not that short. The calendar widget itself requires a wider column so you could actually click into the cell and not always the widget. If you all you cared about was the day of the week, you don't really need the abilities of the date column. Only the topic, date, and pop-up columns have a wider minimum width.