Condition for days of the week

So I have four (4) images within a header, but I only wanted to show one at a time, with the condition being the time of day (morning, afternoon, evening and night). This is the correctly working code:

But now, I’d like to add a fifth image that appears only on the weekend, as well as keep from showing any of the other images.

Another way of looking at: the first four images are only for weekdays and the new image will only be for the weekend (Sat & Sun).

This seemed to work for the new weekend image:
Variable: {{dc:global:date format="D"}}
Condition: is Sun
OR
Variable: {{dc:global:date format="D"}}
Condition: is Sat

But I can’t get the other images to work.