I have no idea what the fold is called but I really wanted to try it, the card when folded fits in a 5 X 5 envelope. For Christmas I love plaids and burgundy so I chose them for the birthday card I used my Elizabeth craft design stitched circle and spellbinder's scalloped circle, the ovals are spellbinders classic dies and the sentiment is from a retired set of Stampin'up.
Close up of the image.
I guess you would call it either the inside or back of the card
Thanks for looking today and don't forget to check out the HMFMC Blog and see how the design team have interpreted the challenge. Remember December Birthday is only an option you can enter Anything Goes.