Question: date and time formatting in numbers won't work
I want to format a cell so that when I choose "insert Date and Time" it is formatted as "12 mar 2018".
I select the cell, choose "date and time" in the format sidebar, select the appropriate date format, but if I then fill the cell with Date & Time from the Insert menu, it is not formatted. I use the latest version (4.3.1) of Numbers on MacOS High Sierra. What did I do wrong or forget?