We are not able to increase the column width for a date type attribute in Gantt chart.
we want to give it as 150 px to make the column header readable but it is not working.
is there any limit given for date fields?
If you are talking about the Gantt chart which is a view of the task object you go to the views and open fields.
Click the field properties icon
There you have the column width
Retrieving data ...