The simplest geometric rubies often show up when lest expected - if we aren't paying attention.
So for Ruby Tuesday, I looked back to Allegra's graduation, knowing that the U-of-Hartford's school colors are white and red.
Voila, this is one that fits perfectly! It is the stage for the main ceremony taken the day before the event. Back then, we were paying attention to the smiles of the graduates above. With a ruby red carpet underfoot, just perfect Mary's fun meme!