There is no setting like this in the package out-of-the-box.
You can however change that. In the Razor function "Composite.News.NewsList" find the helper method "Date" (currently at the end of the file).
@helper Date(DateTime date)
{
<span class="text-muted">
<span class="icon-calendar"></span>
@date.ToShortDateString()
</span>
}
Replace:
@date.ToShortDateString()
with:
@date.ToString("yyyy/M/d")
or follow the guide on other format specifiers here https://msdn.microsoft.com/en-us/library/8kb3ddd4%28v=vs.110%29.aspx
Of course, this will be hard-coded. So you can add another parameter to the Razor function and use its value instead:
[FunctionParameter(Label = "Date format", Help = "...", DefaultValue = "yyyy/M/d")]
public string DateFormat { get; set; }
...
@helper Date(DateTime date)
{
<span class="text-muted">
<span class="icon-calendar"></span>
@date.ToString(DateFormat)
</span>
}
Thus you can use other format specifiers via the function properties in the GUI.