Well as I was guessing, I ran out of yarn. I was knitting Day 22 and felt that I would not be able to repeat the 14 row pattern twice. So I only did one repeat and then knit my final four rows of garter. Yippee for me! Here are pictures of day 17 through 22 (well half of 22).
I already soaked the scarf this morning and it is currently blocking in the guest bedroom. It should be dry by tonight. So hopefully I can post some finished pictures in a day or two. If you want to see some more beautiful Advent Calendar scarves, check out Girls in Sheep Clothing!