In order to make the date be shown or hidden go to the widget's edit mode. You do that by hovering over the item and clicking the pencil icon. The layout tab of the widget will come up ,then click the date icon to toggle the date on or off. If you want to change the date click the date inside the item and it will open a calendar where you can insert a new date.
In every text & image widget a date can either be displayed or hidden.